Merge pull request #12387 from edsantiago/remove_betrue

e2e tests: clean up antihelpful BeTrue()s

30 files changed, 165 insertions, 239 deletions

diff --git a/test/e2e/build_test.go b/test/e2e/build_test.go
index aca2b831b..420ed929f 100644
--- a/test/e2e/build_test.go
+++ b/test/e2e/build_test.go
@@ -230,8 +230,7 @@ RUN printenv http_proxy`, ALPINE)
 		session := podmanTest.Podman([]string{"build", "--pull-never", "--http-proxy", "--file", dockerfilePath, podmanTest.TempDir})
 		session.Wait(120)
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("1.2.3.4")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("1.2.3.4"))
 		os.Unsetenv("http_proxy")
 	})
 
@@ -284,8 +283,7 @@ RUN find /test`, ALPINE)
 		session := podmanTest.Podman([]string{"build", "--pull-never", "-t", "test", "-f", "Containerfile", targetSubPath})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("/test/dummy")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/test/dummy"))
 	})
 
 	It("podman remote test container/docker file is not at root of context dir", func() {
@@ -392,8 +390,7 @@ subdir**`
 		Expect(session).Should(Exit(0))
 		ok, _ := session.GrepString("/testfilter/dummy1")
 		Expect(ok).NotTo(BeTrue())
-		ok, _ = session.GrepString("/testfilter/dummy2")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/testfilter/dummy2"))
 		ok, _ = session.GrepString("/testfilter/subdir")
 		Expect(ok).NotTo(BeTrue()) //.dockerignore filters both subdir and inside subdir
 		ok, _ = session.GrepString("/testfilter/subdir/dummy3")
@@ -450,14 +447,10 @@ RUN [[ -L /test/dummy-symlink ]] && echo SYMLNKOK || echo SYMLNKERR`, ALPINE)
 		session := podmanTest.Podman([]string{"build", "--pull-never", "-t", "test", targetSubPath})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("/test/dummy")
-		Expect(ok).To(BeTrue())
-		ok, _ = session.GrepString("/test/emptyDir")
-		Expect(ok).To(BeTrue())
-		ok, _ = session.GrepString("/test/dummy-symlink")
-		Expect(ok).To(BeTrue())
-		ok, _ = session.GrepString("SYMLNKOK")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/test/dummy"))
+		Expect(session.OutputToString()).To(ContainSubstring("/test/emptyDir"))
+		Expect(session.OutputToString()).To(ContainSubstring("/test/dummy-symlink"))
+		Expect(session.OutputToString()).To(ContainSubstring("SYMLNKOK"))
 	})
 
 	It("podman build --from, --add-host, --cap-drop, --cap-add", func() {
diff --git a/test/e2e/checkpoint_test.go b/test/e2e/checkpoint_test.go
index e34c07d49..cc827a453 100644
--- a/test/e2e/checkpoint_test.go
+++ b/test/e2e/checkpoint_test.go
@@ -191,7 +191,7 @@ var _ = Describe("Podman checkpoint", func() {
 		ps := podmanTest.Podman([]string{"ps", "-q", "--no-trunc"})
 		ps.WaitWithDefaultTimeout()
 		Expect(ps).Should(Exit(0))
-		Expect(ps.LineInOutputContains(session1.OutputToString())).To(BeTrue())
+		Expect(ps.OutputToString()).To(ContainSubstring(session1.OutputToString()))
 		Expect(ps.LineInOutputContains(session2.OutputToString())).To(BeFalse())
 
 		result = podmanTest.Podman([]string{"container", "restore", "second"})
diff --git a/test/e2e/containers_conf_test.go b/test/e2e/containers_conf_test.go
index 2faad8d91..6a760da17 100644
--- a/test/e2e/containers_conf_test.go
+++ b/test/e2e/containers_conf_test.go
@@ -224,21 +224,21 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("search foobar.com")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("search foobar.com")))
 	})
 
 	It("podman run add dns server", func() {
 		session := podmanTest.Podman([]string{"run", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("server 1.2.3.4")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("nameserver 1.2.3.4")))
 	})
 
 	It("podman run add dns option", func() {
 		session := podmanTest.Podman([]string{"run", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("options debug")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("options debug")))
 	})
 
 	It("podman run containers.conf remove all search domain", func() {
@@ -252,7 +252,7 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputStartsWith("search")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("search")))
 		Expect(session.OutputToString()).To(ContainSubstring("foobar.com"))
 
 		Expect(session.OutputToString()).To(ContainSubstring("1.2.3.4"))
@@ -308,7 +308,7 @@ var _ = Describe("Podman run", func() {
 		session = podmanTest.Podman([]string{"run", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputStartsWith("search")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("search")))
 		Expect(session.OutputToString()).To(ContainSubstring("foobar.com"))
 		Expect(session.OutputToString()).To(ContainSubstring("1.2.3.4"))
 		Expect(session.OutputToString()).To(ContainSubstring("debug"))
@@ -430,7 +430,7 @@ var _ = Describe("Podman run", func() {
 		session = podmanTest.Podman([]string{"info", "--format", "{{.Store.ImageCopyTmpDir}}"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("containers/storage/tmp")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("containers/storage/tmp"))
 
 		containersConf = []byte(fmt.Sprintf("[engine]\nimage_copy_tmp_dir=\"storage1\""))
 		err = ioutil.WriteFile(configPath, containersConf, os.ModePerm)
diff --git a/test/e2e/create_test.go b/test/e2e/create_test.go
index d20dc8874..f237d24b9 100644
--- a/test/e2e/create_test.go
+++ b/test/e2e/create_test.go
@@ -237,8 +237,7 @@ var _ = Describe("Podman create", func() {
 
 		check := podmanTest.Podman([]string{"pod", "ps", "--no-trunc"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString("foobar")
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring("foobar"))
 	})
 
 	It("podman create --pod-id-file", func() {
diff --git a/test/e2e/diff_test.go b/test/e2e/diff_test.go
index 65ec0d1de..71696f5b6 100644
--- a/test/e2e/diff_test.go
+++ b/test/e2e/diff_test.go
@@ -64,8 +64,8 @@ var _ = Describe("Podman diff", func() {
 		session.WaitWithDefaultTimeout()
 		containerDiff := session.OutputToStringArray()
 		sort.Strings(containerDiff)
-		Expect(session.LineInOutputContains("C /tmp")).To(BeTrue())
-		Expect(session.LineInOutputContains("A /tmp/diff-test")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("C /tmp"))
+		Expect(session.OutputToString()).To(ContainSubstring("A /tmp/diff-test"))
 		session = podmanTest.Podman([]string{"commit", "diff-test", "diff-test-img"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
@@ -88,8 +88,8 @@ var _ = Describe("Podman diff", func() {
 		session.WaitWithDefaultTimeout()
 		containerDiff := session.OutputToStringArray()
 		sort.Strings(containerDiff)
-		Expect(session.LineInOutputContains("C /tmp")).To(BeTrue())
-		Expect(session.LineInOutputContains("A /tmp/diff-test")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("C /tmp"))
+		Expect(session.OutputToString()).To(ContainSubstring("A /tmp/diff-test"))
 		Expect(session).Should(Exit(0))
 	})
 
@@ -127,9 +127,9 @@ RUN echo test
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(BeNumerically("==", 4))
-		Expect(session.LineInOutputContains("A " + file1)).To(BeTrue())
-		Expect(session.LineInOutputContains("A " + file2)).To(BeTrue())
-		Expect(session.LineInOutputContains("A " + file3)).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("A " + file1))
+		Expect(session.OutputToString()).To(ContainSubstring("A " + file2))
+		Expect(session.OutputToString()).To(ContainSubstring("A " + file3))
 	})
 
 	It("podman image diff of single image", func() {
diff --git a/test/e2e/image_scp_test.go b/test/e2e/image_scp_test.go
index 3e7e8da48..63276e57f 100644
--- a/test/e2e/image_scp_test.go
+++ b/test/e2e/image_scp_test.go
@@ -77,7 +77,7 @@ var _ = Describe("podman image scp", func() {
 		list := podmanTest.Podman([]string{"image", "list"}) // our image should now contain alpine loaded in from root
 		list.WaitWithDefaultTimeout()
 		Expect(list).To(Exit(0))
-		Expect(list.LineInOutputStartsWith("quay.io/libpod/alpine")).To(BeTrue())
+		Expect(list.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/alpine")))
 
 		scp = podmanTest.PodmanAsUser([]string{"image", "scp", "root@localhost::" + ALPINE}, 0, 0, "", env) //transfer from root to rootless (us)
 		scp.WaitWithDefaultTimeout()
diff --git a/test/e2e/images_test.go b/test/e2e/images_test.go
index b07e287ac..3ed8ef462 100644
--- a/test/e2e/images_test.go
+++ b/test/e2e/images_test.go
@@ -41,8 +41,8 @@ var _ = Describe("Podman images", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(BeNumerically(">", 2))
-		Expect(session.LineInOutputStartsWith("quay.io/libpod/alpine")).To(BeTrue())
-		Expect(session.LineInOutputStartsWith("quay.io/libpod/busybox")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/alpine")))
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/busybox")))
 	})
 
 	It("podman image List", func() {
@@ -50,8 +50,8 @@ var _ = Describe("Podman images", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(BeNumerically(">", 2))
-		Expect(session.LineInOutputStartsWith("quay.io/libpod/alpine")).To(BeTrue())
-		Expect(session.LineInOutputStartsWith("quay.io/libpod/busybox")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/alpine")))
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/busybox")))
 	})
 
 	It("podman images with multiple tags", func() {
@@ -86,8 +86,8 @@ var _ = Describe("Podman images", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(BeNumerically(">", 2))
-		Expect(session.LineInOutputStartsWith("quay.io/libpod/alpine")).To(BeTrue())
-		Expect(session.LineInOutputStartsWith("quay.io/libpod/busybox")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/alpine")))
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("quay.io/libpod/busybox")))
 	})
 
 	It("podman empty images list in JSON format", func() {
@@ -150,13 +150,13 @@ var _ = Describe("Podman images", func() {
 		retalpine.WaitWithDefaultTimeout()
 		Expect(retalpine).Should(Exit(0))
 		Expect(len(retalpine.OutputToStringArray())).To(Equal(6))
-		Expect(retalpine.LineInOutputContains("alpine")).To(BeTrue())
+		Expect(retalpine.OutputToString()).To(ContainSubstring("alpine"))
 
 		retalpine = podmanTest.Podman([]string{"images", "-f", "reference=alpine"})
 		retalpine.WaitWithDefaultTimeout()
 		Expect(retalpine).Should(Exit(0))
 		Expect(len(retalpine.OutputToStringArray())).To(Equal(6))
-		Expect(retalpine.LineInOutputContains("alpine")).To(BeTrue())
+		Expect(retalpine.OutputToString()).To(ContainSubstring("alpine"))
 
 		retnone := podmanTest.Podman([]string{"images", "-q", "-f", "reference=bogus"})
 		retnone.WaitWithDefaultTimeout()
diff --git a/test/e2e/import_test.go b/test/e2e/import_test.go
index 13a0f6f90..5531bed8c 100644
--- a/test/e2e/import_test.go
+++ b/test/e2e/import_test.go
@@ -87,7 +87,7 @@ var _ = Describe("Podman import", func() {
 		results := podmanTest.Podman([]string{"history", "imported-image", "--format", "{{.Comment}}"})
 		results.WaitWithDefaultTimeout()
 		Expect(results).Should(Exit(0))
-		Expect(results.LineInOutputStartsWith("importing container test message")).To(BeTrue())
+		Expect(results.OutputToStringArray()).To(ContainElement(HavePrefix("importing container test message")))
 	})
 
 	It("podman import with change flag CMD=<path>", func() {
diff --git a/test/e2e/load_test.go b/test/e2e/load_test.go
index a3ee1814a..e79c1eb8a 100644
--- a/test/e2e/load_test.go
+++ b/test/e2e/load_test.go
@@ -214,7 +214,7 @@ var _ = Describe("Podman load", func() {
 		result := podmanTest.Podman([]string{"images", "hello:world"})
 		result.WaitWithDefaultTimeout()
 		Expect(result.LineInOutputContains("docker")).To(Not(BeTrue()))
-		Expect(result.LineInOutputContains("localhost")).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring("localhost"))
 	})
 
 	It("podman load localhost registry from scratch and :latest", func() {
@@ -239,7 +239,7 @@ var _ = Describe("Podman load", func() {
 		result := podmanTest.Podman([]string{"images", "hello:latest"})
 		result.WaitWithDefaultTimeout()
 		Expect(result.LineInOutputContains("docker")).To(Not(BeTrue()))
-		Expect(result.LineInOutputContains("localhost")).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring("localhost"))
 	})
 
 	It("podman load localhost registry from dir", func() {
@@ -265,7 +265,7 @@ var _ = Describe("Podman load", func() {
 		result := podmanTest.Podman([]string{"images", "load:latest"})
 		result.WaitWithDefaultTimeout()
 		Expect(result.LineInOutputContains("docker")).To(Not(BeTrue()))
-		Expect(result.LineInOutputContains("localhost")).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring("localhost"))
 	})
 
 	It("podman load xz compressed image", func() {
@@ -290,7 +290,7 @@ var _ = Describe("Podman load", func() {
 		result := podmanTest.Podman([]string{"load", "-i", "./testdata/docker-two-images.tar.xz"})
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
-		Expect(result.LineInOutputContains("example.com/empty:latest")).To(BeTrue())
-		Expect(result.LineInOutputContains("example.com/empty/but:different")).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring("example.com/empty:latest"))
+		Expect(result.OutputToString()).To(ContainSubstring("example.com/empty/but:different"))
 	})
 })
diff --git a/test/e2e/network_test.go b/test/e2e/network_test.go
index d64b28063..953380335 100644
--- a/test/e2e/network_test.go
+++ b/test/e2e/network_test.go
@@ -46,7 +46,7 @@ var _ = Describe("Podman network", func() {
 		session := podmanTest.Podman([]string{"network", "ls"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains(name)).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(name))
 	})
 
 	It("podman network list -q", func() {
@@ -56,7 +56,7 @@ var _ = Describe("Podman network", func() {
 		session := podmanTest.Podman([]string{"network", "ls", "--quiet"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains(name)).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(name))
 	})
 
 	It("podman network list --filter success", func() {
@@ -66,7 +66,7 @@ var _ = Describe("Podman network", func() {
 		session := podmanTest.Podman([]string{"network", "ls", "--filter", "driver=bridge"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains(name)).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(name))
 	})
 
 	It("podman network list --filter driver and name", func() {
@@ -200,7 +200,7 @@ var _ = Describe("Podman network", func() {
 			session := podmanTest.Podman([]string{"network", "ls", "--quiet"})
 			session.WaitWithDefaultTimeout()
 			Expect(session).Should(Exit(0))
-			Expect(session.LineInOutputContains(name)).To(BeTrue())
+			Expect(session.OutputToString()).To(ContainSubstring(name))
 
 			rm := podmanTest.Podman([]string{"network", rm, name})
 			rm.WaitWithDefaultTimeout()
diff --git a/test/e2e/pod_create_test.go b/test/e2e/pod_create_test.go
index f5a2caad7..820b13a17 100644
--- a/test/e2e/pod_create_test.go
+++ b/test/e2e/pod_create_test.go
@@ -48,8 +48,7 @@ var _ = Describe("Podman pod create", func() {
 
 		check := podmanTest.Podman([]string{"pod", "ps", "-q", "--no-trunc"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString(podID)
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring(podID))
 		Expect(len(check.OutputToStringArray())).To(Equal(1))
 	})
 
@@ -60,8 +59,7 @@ var _ = Describe("Podman pod create", func() {
 
 		check := podmanTest.Podman([]string{"pod", "ps", "--no-trunc"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString(name)
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring(name))
 	})
 
 	It("podman create pod with doubled name", func() {
@@ -646,8 +644,7 @@ ENTRYPOINT ["sleep","99999"]
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		uid := fmt.Sprintf("%d", os.Geteuid())
-		ok, _ := session.GrepString(uid)
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(uid))
 
 		// Check passwd
 		session = podmanTest.Podman([]string{"run", "--pod", podName, ALPINE, "id", "-un"})
@@ -655,8 +652,7 @@ ENTRYPOINT ["sleep","99999"]
 		Expect(session).Should(Exit(0))
 		u, err := user.Current()
 		Expect(err).To(BeNil())
-		ok, _ = session.GrepString(u.Name)
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(u.Name))
 
 		// root owns /usr
 		session = podmanTest.Podman([]string{"run", "--pod", podName, ALPINE, "stat", "-c%u", "/usr"})
@@ -808,8 +804,7 @@ ENTRYPOINT ["sleep","99999"]
 		session = podmanTest.Podman([]string{"run", "--pod", podName, ALPINE, "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("8191")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("8191"))
 	})
 
 	It("podman pod create --userns=auto:gidmapping=", func() {
@@ -846,8 +841,7 @@ ENTRYPOINT ["sleep","99999"]
 		session = podmanTest.Podman([]string{"run", "--pod", podName, ALPINE, "cat", "/proc/self/gid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("8191")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("8191"))
 	})
 
 	It("podman pod create --volume", func() {
diff --git a/test/e2e/pod_infra_container_test.go b/test/e2e/pod_infra_container_test.go
index 3bd7f48ab..6d57c3887 100644
--- a/test/e2e/pod_infra_container_test.go
+++ b/test/e2e/pod_infra_container_test.go
@@ -42,8 +42,7 @@ var _ = Describe("Podman pod create", func() {
 
 		check := podmanTest.Podman([]string{"pod", "ps", "-q", "--no-trunc"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString(podID)
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring(podID))
 		Expect(len(check.OutputToStringArray())).To(Equal(1))
 
 		check = podmanTest.Podman([]string{"ps", "-qa", "--no-trunc"})
diff --git a/test/e2e/port_test.go b/test/e2e/port_test.go
index e5c7576ae..776687113 100644
--- a/test/e2e/port_test.go
+++ b/test/e2e/port_test.go
@@ -62,7 +62,7 @@ var _ = Describe("Podman port", func() {
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
 		port := strings.Split(result.OutputToStringArray()[0], ":")[1]
-		Expect(result.LineInOutputStartsWith(fmt.Sprintf("80/tcp -> 0.0.0.0:%s", port))).To(BeTrue())
+		Expect(result.OutputToStringArray()).To(ContainElement(HavePrefix(fmt.Sprintf("80/tcp -> 0.0.0.0:%s", port))))
 	})
 
 	It("podman container port  -l nginx", func() {
@@ -80,7 +80,7 @@ var _ = Describe("Podman port", func() {
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
 		port := strings.Split(result.OutputToStringArray()[0], ":")[1]
-		Expect(result.LineInOutputStartsWith(fmt.Sprintf("80/tcp -> 0.0.0.0:%s", port))).To(BeTrue())
+		Expect(result.OutputToStringArray()).To(ContainElement(HavePrefix(fmt.Sprintf("80/tcp -> 0.0.0.0:%s", port))))
 	})
 
 	It("podman port -l port nginx", func() {
@@ -98,7 +98,7 @@ var _ = Describe("Podman port", func() {
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
 		port := strings.Split(result.OutputToStringArray()[0], ":")[1]
-		Expect(result.LineInOutputStartsWith(fmt.Sprintf("0.0.0.0:%s", port))).To(BeTrue())
+		Expect(result.OutputToStringArray()).To(ContainElement(HavePrefix(fmt.Sprintf("0.0.0.0:%s", port))))
 	})
 
 	It("podman port -a nginx", func() {
@@ -125,7 +125,7 @@ var _ = Describe("Podman port", func() {
 		result := podmanTest.Podman([]string{"port", "portcheck"})
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
-		result.LineInOutputStartsWith("80/tcp -> 0.0.0.0:")
+		Expect(result.OutputToStringArray()).To(ContainElement(HavePrefix("80/tcp -> 0.0.0.0:")))
 	})
 
 	It("podman port multiple ports", func() {
@@ -143,12 +143,12 @@ var _ = Describe("Podman port", func() {
 		result1 := podmanTest.Podman([]string{"port", "test", "5000"})
 		result1.WaitWithDefaultTimeout()
 		Expect(result1).Should(Exit(0))
-		Expect(result1.LineInOutputStartsWith("0.0.0.0:5000")).To(BeTrue())
+		Expect(result1.OutputToStringArray()).To(ContainElement(HavePrefix("0.0.0.0:5000")))
 
 		// Check that the second port was honored
 		result2 := podmanTest.Podman([]string{"port", "test", "5001"})
 		result2.WaitWithDefaultTimeout()
 		Expect(result2).Should(Exit(0))
-		Expect(result2.LineInOutputStartsWith("0.0.0.0:5001")).To(BeTrue())
+		Expect(result2.OutputToStringArray()).To(ContainElement(HavePrefix("0.0.0.0:5001")))
 	})
 })
diff --git a/test/e2e/prune_test.go b/test/e2e/prune_test.go
index ff70a8cf4..223fcc5b2 100644
--- a/test/e2e/prune_test.go
+++ b/test/e2e/prune_test.go
@@ -153,8 +153,7 @@ var _ = Describe("Podman prune", func() {
 		session := podmanTest.Podman([]string{"images", "-a"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		hasNone, _ := session.GrepString("<none>")
-		Expect(hasNone).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("<none>"))
 
 		// Nothing will be pruned.
 		session = podmanTest.Podman([]string{"image", "prune", "-f"})
diff --git a/test/e2e/ps_test.go b/test/e2e/ps_test.go
index 881d9fcf0..0afd74bcb 100644
--- a/test/e2e/ps_test.go
+++ b/test/e2e/ps_test.go
@@ -671,51 +671,51 @@ var _ = Describe("Podman ps", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(5))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
-		Expect(session.LineInOutputContains("test3")).To(BeTrue())
-		Expect(session.LineInOutputContains("test4")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
+		Expect(session.OutputToString()).To(ContainSubstring("test3"))
+		Expect(session.OutputToString()).To(ContainSubstring("test4"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "name=test1", "--filter", "name=test2"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(3))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
 
 		// check container id matches with regex
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "id=" + cid1[:40], "--filter", "id=" + cid1 + "$"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
 
 		session = podmanTest.Podman([]string{"ps", "--filter", "status=created"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test3")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test3"))
 
 		session = podmanTest.Podman([]string{"ps", "--filter", "status=created", "--filter", "status=exited"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(4))
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
-		Expect(session.LineInOutputContains("test3")).To(BeTrue())
-		Expect(session.LineInOutputContains("test4")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
+		Expect(session.OutputToString()).To(ContainSubstring("test3"))
+		Expect(session.OutputToString()).To(ContainSubstring("test4"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "label=foo=1"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(3))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
 
 		session = podmanTest.Podman([]string{"ps", "--filter", "label=foo=1", "--filter", "status=exited"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "label=foo=1", "--filter", "label=non=1"})
 		session.WaitWithDefaultTimeout()
@@ -726,46 +726,46 @@ var _ = Describe("Podman ps", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "exited=1"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "exited=1", "--filter", "exited=0"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(3))
-		Expect(session.LineInOutputContains("test2")).To(BeTrue())
-		Expect(session.LineInOutputContains("test4")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test2"))
+		Expect(session.OutputToString()).To(ContainSubstring("test4"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "volume=volume1"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(3))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
-		Expect(session.LineInOutputContains("test4")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
+		Expect(session.OutputToString()).To(ContainSubstring("test4"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "volume=/:/test2"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test4")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test4"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "before=test2"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(2))
-		Expect(session.LineInOutputContains("test1")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test1"))
 
 		session = podmanTest.Podman([]string{"ps", "--all", "--filter", "since=test2"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		Expect(len(session.OutputToStringArray())).To(Equal(3))
-		Expect(session.LineInOutputContains("test3")).To(BeTrue())
-		Expect(session.LineInOutputContains("test4")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("test3"))
+		Expect(session.OutputToString()).To(ContainSubstring("test4"))
 	})
 	It("podman ps filter pod", func() {
 		pod1 := podmanTest.Podman([]string{"pod", "create", "--name", "pod1"})
diff --git a/test/e2e/rmi_test.go b/test/e2e/rmi_test.go
index 03a347a6f..196d8879d 100644
--- a/test/e2e/rmi_test.go
+++ b/test/e2e/rmi_test.go
@@ -89,7 +89,7 @@ var _ = Describe("Podman rmi", func() {
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
 
-		Expect(result.LineInOutputContains(setup.OutputToString())).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring(setup.OutputToString()))
 	})
 
 	It("podman rmi image with tags by ID cannot be done without force", func() {
diff --git a/test/e2e/run_cpu_test.go b/test/e2e/run_cpu_test.go
index 6dbb5886d..dc9c6820b 100644
--- a/test/e2e/run_cpu_test.go
+++ b/test/e2e/run_cpu_test.go
@@ -52,7 +52,7 @@ var _ = Describe("Podman run cpu", func() {
 		}
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
-		Expect(result.LineInOutputContains("5000")).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring("5000"))
 	})
 
 	It("podman run cpu-quota", func() {
@@ -65,7 +65,7 @@ var _ = Describe("Podman run cpu", func() {
 		}
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
-		Expect(result.LineInOutputContains("5000")).To(BeTrue())
+		Expect(result.OutputToString()).To(ContainSubstring("5000"))
 	})
 
 	It("podman run cpus", func() {
diff --git a/test/e2e/run_dns_test.go b/test/e2e/run_dns_test.go
index 166160ad2..beb6390e0 100644
--- a/test/e2e/run_dns_test.go
+++ b/test/e2e/run_dns_test.go
@@ -37,7 +37,7 @@ var _ = Describe("Podman run dns", func() {
 		session := podmanTest.Podman([]string{"run", "--dns-search=foobar.com", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("search foobar.com")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("search foobar.com")))
 	})
 
 	It("podman run remove all search domain", func() {
@@ -57,14 +57,15 @@ var _ = Describe("Podman run dns", func() {
 		session := podmanTest.Podman([]string{"run", "--dns=1.2.3.4", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("server 1.2.3.4")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("nameserver 1.2.3.4")))
+
 	})
 
 	It("podman run add dns option", func() {
 		session := podmanTest.Podman([]string{"run", "--dns-opt=debug", ALPINE, "cat", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("options debug")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("options debug")))
 	})
 
 	It("podman run add bad host", func() {
@@ -77,8 +78,8 @@ var _ = Describe("Podman run dns", func() {
 		session := podmanTest.Podman([]string{"run", "--add-host=foobar:1.1.1.1", "--add-host=foobaz:2001:db8::68", ALPINE, "cat", "/etc/hosts"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session.LineInOutputStartsWith("1.1.1.1 foobar")
-		session.LineInOutputStartsWith("2001:db8::68 foobaz")
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("1.1.1.1 foobar")))
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("2001:db8::68 foobaz")))
 	})
 
 	It("podman run add hostname", func() {
@@ -97,7 +98,7 @@ var _ = Describe("Podman run dns", func() {
 		session := podmanTest.Podman([]string{"run", "-t", "-i", "--hostname=foobar", ALPINE, "cat", "/etc/hosts"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("foobar")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("foobar"))
 	})
 
 	It("podman run mutually excludes --dns* and --network", func() {
diff --git a/test/e2e/run_entrypoint_test.go b/test/e2e/run_entrypoint_test.go
index 9560b1627..f500a3c7c 100644
--- a/test/e2e/run_entrypoint_test.go
+++ b/test/e2e/run_entrypoint_test.go
@@ -112,12 +112,12 @@ ENTRYPOINT ["grep", "Alpine", "/etc/os-release"]
 		session := podmanTest.Podman([]string{"run", "--entrypoint=uname", "foobar.com/entrypoint:latest"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputStartsWith("Linux")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("Linux")))
 
 		session = podmanTest.Podman([]string{"run", "--entrypoint", "", "foobar.com/entrypoint:latest", "uname"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputStartsWith("Linux")).To(BeTrue())
+		Expect(session.OutputToStringArray()).To(ContainElement(HavePrefix("Linux")))
 	})
 
 	It("podman run user entrypoint with command overrides image entrypoint and image cmd", func() {
diff --git a/test/e2e/run_env_test.go b/test/e2e/run_env_test.go
index 9324c1957..5a62db809 100644
--- a/test/e2e/run_env_test.go
+++ b/test/e2e/run_env_test.go
@@ -37,39 +37,33 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", ALPINE, "printenv", "HOME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("/root")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/root"))
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--user", "2", ALPINE, "printenv", "HOME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("/sbin")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/sbin"))
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--env", "HOME=/foo", ALPINE, "printenv", "HOME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("/foo")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/foo"))
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--env", "FOO=BAR,BAZ", ALPINE, "printenv", "FOO"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("BAR,BAZ")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("BAR,BAZ"))
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--env", "PATH=/bin", ALPINE, "printenv", "PATH"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("/bin")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/bin"))
 
 		os.Setenv("FOO", "BAR")
 		session = podmanTest.Podman([]string{"run", "--rm", "--env", "FOO", ALPINE, "printenv", "FOO"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("BAR")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("BAR"))
 		os.Unsetenv("FOO")
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--env", "FOO", ALPINE, "printenv", "FOO"})
@@ -86,8 +80,7 @@ var _ = Describe("Podman run", func() {
 		session = podmanTest.Podman([]string{"run", "--rm", ALPINE, "sh", "-c", "printenv"})
 		session.Wait(10)
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("HOSTNAME")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("HOSTNAME"))
 	})
 
 	It("podman run --env-host environment test", func() {
@@ -101,14 +94,12 @@ var _ = Describe("Podman run", func() {
 			return
 		}
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("BAR")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("BAR"))
 
 		session = podmanTest.PodmanAsUser([]string{"run", "--rm", "--env", "FOO=BAR1", "--env-host", ALPINE, "/bin/printenv", "FOO"}, 0, 0, "", env)
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("BAR1")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("BAR1"))
 		os.Unsetenv("FOO")
 	})
 
@@ -121,8 +112,7 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", ALPINE, "printenv", "http_proxy"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("1.2.3.4")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("1.2.3.4"))
 
 		session = podmanTest.Podman([]string{"run", "--http-proxy=false", ALPINE, "printenv", "http_proxy"})
 		session.WaitWithDefaultTimeout()
@@ -132,15 +122,13 @@ var _ = Describe("Podman run", func() {
 		session = podmanTest.Podman([]string{"run", "--env", "http_proxy=5.6.7.8", ALPINE, "printenv", "http_proxy"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("5.6.7.8")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("5.6.7.8"))
 		os.Unsetenv("http_proxy")
 
 		session = podmanTest.Podman([]string{"run", "--http-proxy=false", "--env", "http_proxy=5.6.7.8", ALPINE, "printenv", "http_proxy"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ = session.GrepString("5.6.7.8")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("5.6.7.8"))
 		os.Unsetenv("http_proxy")
 	})
 })
diff --git a/test/e2e/run_networking_test.go b/test/e2e/run_networking_test.go
index 596159fe9..e2004c8e0 100644
--- a/test/e2e/run_networking_test.go
+++ b/test/e2e/run_networking_test.go
@@ -559,38 +559,33 @@ EXPOSE 2004-2005/tcp`, ALPINE)
 		session := podmanTest.Podman([]string{"run", "--rm", "--net", "host", ALPINE, "printenv", "HOSTNAME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString(hostname)
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(hostname))
 	})
 	It("podman run --net host --uts host hostname test", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", "--net", "host", "--uts", "host", ALPINE, "printenv", "HOSTNAME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString(hostname)
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(hostname))
 	})
 	It("podman run --uts host hostname test", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", "--uts", "host", ALPINE, "printenv", "HOSTNAME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString(hostname)
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(hostname))
 	})
 
 	It("podman run --net host --hostname ... hostname test", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", "--net", "host", "--hostname", "foobar", ALPINE, "printenv", "HOSTNAME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("foobar")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("foobar"))
 	})
 
 	It("podman run --hostname ... hostname test", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", "--hostname", "foobar", ALPINE, "printenv", "HOSTNAME"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("foobar")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("foobar"))
 	})
 
 	It("podman run --net container: and --uts container:", func() {
diff --git a/test/e2e/run_passwd_test.go b/test/e2e/run_passwd_test.go
index 3e7e73fad..05cdc7d80 100644
--- a/test/e2e/run_passwd_test.go
+++ b/test/e2e/run_passwd_test.go
@@ -58,7 +58,7 @@ var _ = Describe("Podman run passwd", func() {
 		session := podmanTest.Podman([]string{"run", "--read-only", "-u", "20001:1", BB, "mount"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("passwd")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("passwd"))
 	})
 
 	It("podman can run container without /etc/passwd", func() {
@@ -104,14 +104,14 @@ USER 1000`, ALPINE)
 		session := podmanTest.Podman([]string{"run", "--read-only", "-u", "20001:20001", BB, "mount"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("/etc/group")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/etc/group"))
 	})
 
 	It("podman run numeric user not specified in container modifies group", func() {
 		session := podmanTest.Podman([]string{"run", "--read-only", "-u", "20001", BB, "mount"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("/etc/group")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/etc/group"))
 	})
 
 	It("podman run numeric group from image and no group file", func() {
diff --git a/test/e2e/run_selinux_test.go b/test/e2e/run_selinux_test.go
index 3cb0663e0..cf63760cc 100644
--- a/test/e2e/run_selinux_test.go
+++ b/test/e2e/run_selinux_test.go
@@ -42,24 +42,21 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", ALPINE, "cat", "/proc/self/attr/current"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_t"))
 	})
 
 	It("podman run selinux grep test", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--security-opt", "label=level:s0:c1,c2", ALPINE, "cat", "/proc/self/attr/current"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("s0:c1,c2")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("s0:c1,c2"))
 	})
 
 	It("podman run selinux disable test", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--security-opt", "label=disable", ALPINE, "cat", "/proc/self/attr/current"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("spc_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("spc_t"))
 	})
 
 	It("podman run selinux type check test", func() {
@@ -75,88 +72,77 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--security-opt", "label=type:spc_t", ALPINE, "cat", "/proc/self/attr/current"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("spc_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("spc_t"))
 	})
 
 	It("podman privileged selinux", func() {
 		session := podmanTest.Podman([]string{"run", "--privileged", ALPINE, "cat", "/proc/self/attr/current"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("spc_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("spc_t"))
 	})
 
 	It("podman test selinux label resolv.conf", func() {
 		session := podmanTest.Podman([]string{"run", fedoraMinimal, "ls", "-Z", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux label hosts", func() {
 		session := podmanTest.Podman([]string{"run", fedoraMinimal, "ls", "-Z", "/etc/hosts"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux label hostname", func() {
 		session := podmanTest.Podman([]string{"run", fedoraMinimal, "ls", "-Z", "/etc/hostname"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux label /run/secrets", func() {
 		session := podmanTest.Podman([]string{"run", fedoraMinimal, "ls", "-dZ", "/run/secrets"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux --privileged label resolv.conf", func() {
 		session := podmanTest.Podman([]string{"run", "--privileged", fedoraMinimal, "ls", "-Z", "/etc/resolv.conf"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux --privileged label hosts", func() {
 		session := podmanTest.Podman([]string{"run", "--privileged", fedoraMinimal, "ls", "-Z", "/etc/hosts"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux --privileged label hostname", func() {
 		session := podmanTest.Podman([]string{"run", "--privileged", fedoraMinimal, "ls", "-Z", "/etc/hostname"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman test selinux --privileged label /run/secrets", func() {
 		session := podmanTest.Podman([]string{"run", "--privileged", fedoraMinimal, "ls", "-dZ", "/run/secrets"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_file_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_file_t"))
 	})
 
 	It("podman run selinux file type setup test", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--security-opt", "label=type:spc_t", "--security-opt", "label=filetype:container_var_lib_t", fedoraMinimal, "ls", "-Z", "/dev"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("container_var_lib_t")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("container_var_lib_t"))
 
 		session = podmanTest.Podman([]string{"run", "-it", "--security-opt", "label=type:spc_t", "--security-opt", "label=filetype:foobar", fedoraMinimal, "ls", "-Z", "/dev"})
 		session.WaitWithDefaultTimeout()
@@ -179,10 +165,8 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--privileged", "--security-opt", "label=type:spc_t", "--security-opt", "label=level:s0:c1,c2", ALPINE, "cat", "/proc/self/attr/current"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("spc_t")
-		Expect(match).To(BeTrue())
-		match2, _ := session.GrepString("s0:c1,c2")
-		Expect(match2).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("spc_t"))
+		Expect(session.OutputToString()).To(ContainSubstring("s0:c1,c2"))
 	})
 
 	It("podman pod container share SELinux labels", func() {
@@ -349,7 +333,6 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "-v", "testvol:/test1/test:Z", fedoraMinimal, "ls", "-alZ", "/test1"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString(":s0:")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(":s0:"))
 	})
 })
diff --git a/test/e2e/run_test.go b/test/e2e/run_test.go
index 2be2154ff..ec64d2166 100644
--- a/test/e2e/run_test.go
+++ b/test/e2e/run_test.go
@@ -152,8 +152,7 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", ALPINE, "find", "/etc", "-name", "hosts"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString("/etc/hosts")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("/etc/hosts"))
 	})
 
 	It("podman create pod with name in /etc/hosts", func() {
@@ -162,10 +161,8 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "-ti", "--rm", "--name", name, "--hostname", hostname, ALPINE, "cat", "/etc/hosts"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		match, _ := session.GrepString(name)
-		Expect(match).Should(BeTrue())
-		match, _ = session.GrepString(hostname)
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(name))
+		Expect(session.OutputToString()).To(ContainSubstring(hostname))
 	})
 
 	It("podman run a container based on remote image", func() {
@@ -421,16 +418,14 @@ var _ = Describe("Podman run", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--security-opt", strings.Join([]string{"seccomp=", forbidGetCWDSeccompProfile()}, ""), ALPINE, "pwd"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).To(ExitWithError())
-		match, _ := session.GrepString("Operation not permitted")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("Operation not permitted"))
 	})
 
 	It("podman run seccomp test --privileged", func() {
 		session := podmanTest.Podman([]string{"run", "-it", "--privileged", "--security-opt", strings.Join([]string{"seccomp=", forbidGetCWDSeccompProfile()}, ""), ALPINE, "pwd"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).To(ExitWithError())
-		match, _ := session.GrepString("Operation not permitted")
-		Expect(match).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("Operation not permitted"))
 	})
 
 	It("podman run seccomp test --privileged no profile should be unconfined", func() {
@@ -879,14 +874,14 @@ USER bin`, BB)
 		session := podmanTest.Podman([]string{"run", "--rm", "--group-add=audio", "--group-add=nogroup", "--group-add=777", ALPINE, "id"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("777,65533(nogroup)")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("777,65533(nogroup)"))
 	})
 
 	It("podman run with user (default)", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", ALPINE, "id"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("uid=0(root) gid=0(root)")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("uid=0(root) gid=0(root)"))
 	})
 
 	It("podman run with user (integer, not in /etc/passwd)", func() {
@@ -900,14 +895,14 @@ USER bin`, BB)
 		session := podmanTest.Podman([]string{"run", "--rm", "--user=8", ALPINE, "id"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("uid=8(mail) gid=12(mail)")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("uid=8(mail) gid=12(mail)"))
 	})
 
 	It("podman run with user (username)", func() {
 		session := podmanTest.Podman([]string{"run", "--rm", "--user=mail", ALPINE, "id"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		Expect(session.LineInOutputContains("uid=8(mail) gid=12(mail)")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("uid=8(mail) gid=12(mail)"))
 	})
 
 	It("podman run with user:group (username:integer)", func() {
@@ -939,7 +934,7 @@ USER bin`, BB)
 		ps := podmanTest.Podman([]string{"ps", "-aq", "--no-trunc"})
 		ps.WaitWithDefaultTimeout()
 		Expect(ps).Should(Exit(0))
-		Expect(ps.LineInOutputContains(session.OutputToString())).To(BeTrue())
+		Expect(ps.OutputToString()).To(ContainSubstring(session.OutputToString()))
 	})
 
 	It("podman run with attach stdout does not print stderr", func() {
@@ -1217,8 +1212,7 @@ USER mail`, BB)
 
 		check := podmanTest.Podman([]string{"pod", "ps", "--no-trunc"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString("foobar")
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring("foobar"))
 	})
 
 	It("podman run --pod new with hostname", func() {
diff --git a/test/e2e/run_userns_test.go b/test/e2e/run_userns_test.go
index 1fe95a1bf..9b981ef72 100644
--- a/test/e2e/run_userns_test.go
+++ b/test/e2e/run_userns_test.go
@@ -47,8 +47,7 @@ var _ = Describe("Podman UserNS support", func() {
 		session := podmanTest.Podman([]string{"run", "--uidmap=0:100:5000", "--gidmap=0:200:5000", "alpine", "echo", "hello"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("hello")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("hello"))
 	})
 
 	// It essentially repeats the test above but with the `-it` short option
@@ -59,24 +58,21 @@ var _ = Describe("Podman UserNS support", func() {
 		session := podmanTest.Podman([]string{"run", "--uidmap=0:1:5000", "--gidmap=0:200:5000", "-it", "alpine", "echo", "hello"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("hello")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("hello"))
 	})
 
 	It("podman uidmapping and gidmapping with a volume", func() {
 		session := podmanTest.Podman([]string{"run", "--uidmap=0:1:500", "--gidmap=0:200:5000", "-v", "my-foo-volume:/foo:Z", "alpine", "echo", "hello"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("hello")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("hello"))
 	})
 
 	It("podman uidmapping and gidmapping --net=host", func() {
 		session := podmanTest.Podman([]string{"run", "--net=host", "--uidmap=0:1:5000", "--gidmap=0:200:5000", "alpine", "echo", "hello"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("hello")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("hello"))
 	})
 
 	It("podman --userns=keep-id", func() {
@@ -84,8 +80,7 @@ var _ = Describe("Podman UserNS support", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 		uid := fmt.Sprintf("%d", os.Geteuid())
-		ok, _ := session.GrepString(uid)
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(uid))
 	})
 
 	It("podman --userns=keep-id check passwd", func() {
@@ -94,8 +89,7 @@ var _ = Describe("Podman UserNS support", func() {
 		Expect(session).Should(Exit(0))
 		u, err := user.Current()
 		Expect(err).To(BeNil())
-		ok, _ := session.GrepString(u.Name)
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(u.Name))
 	})
 
 	It("podman --userns=keep-id root owns /usr", func() {
@@ -186,23 +180,22 @@ var _ = Describe("Podman UserNS support", func() {
 		session := podmanTest.Podman([]string{"run", "--userns=auto:size=500", "alpine", "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("500")
+		Expect(session.OutputToString()).To(ContainSubstring("500"))
 
 		session = podmanTest.Podman([]string{"run", "--userns=auto:size=3000", "alpine", "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ = session.GrepString("3000")
+		Expect(session.OutputToString()).To(ContainSubstring("3000"))
 
 		session = podmanTest.Podman([]string{"run", "--userns=auto", "--user=2000:3000", "alpine", "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ = session.GrepString("3001")
+		Expect(session.OutputToString()).To(ContainSubstring("3001"))
 
 		session = podmanTest.Podman([]string{"run", "--userns=auto", "--user=4000:1000", "alpine", "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ = session.GrepString("4001")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("4001"))
 	})
 
 	It("podman --userns=auto:uidmapping=", func() {
@@ -231,8 +224,7 @@ var _ = Describe("Podman UserNS support", func() {
 		session = podmanTest.Podman([]string{"run", "--userns=auto:size=8192,uidmapping=0:0:1", "alpine", "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("8191")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("8191"))
 	})
 
 	It("podman --userns=auto:gidmapping=", func() {
@@ -261,8 +253,7 @@ var _ = Describe("Podman UserNS support", func() {
 		session = podmanTest.Podman([]string{"run", "--userns=auto:size=8192,gidmapping=0:0:1", "alpine", "cat", "/proc/self/gid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		ok, _ := session.GrepString("8191")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("8191"))
 	})
 
 	It("podman --userns=container:CTR", func() {
@@ -276,15 +267,13 @@ var _ = Describe("Podman UserNS support", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 
-		ok, _ := session.GrepString("4998")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("4998"))
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--userns=container:" + ctrName, "--net=container:" + ctrName, "alpine", "cat", "/proc/self/uid_map"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 
-		ok, _ = session.GrepString("4998")
-		Expect(ok).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("4998"))
 	})
 
 	It("podman --user with volume", func() {
diff --git a/test/e2e/run_volume_test.go b/test/e2e/run_volume_test.go
index 5ce4d9acf..0de2dbd65 100644
--- a/test/e2e/run_volume_test.go
+++ b/test/e2e/run_volume_test.go
@@ -681,21 +681,18 @@ VOLUME /test/`, ALPINE)
 		session := podmanTest.Podman([]string{"run", "--rm", "--user", "888:888", "-v", vol, ALPINE, "stat", "-c", "%u:%g", dest})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		found, _ := session.GrepString("888:888")
-		Expect(found).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("888:888"))
 
 		session = podmanTest.Podman([]string{"run", "--rm", "--user", "888:888", "--userns", "auto", "-v", vol, ALPINE, "stat", "-c", "%u:%g", dest})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		found, _ = session.GrepString("888:888")
-		Expect(found).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("888:888"))
 
 		vol = vol + ",O"
 		session = podmanTest.Podman([]string{"run", "--rm", "--user", "888:888", "--userns", "keep-id", "-v", vol, ALPINE, "stat", "-c", "%u:%g", dest})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		found, _ = session.GrepString("888:888")
-		Expect(found).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("888:888"))
 	})
 
 	It("podman run with --mount and U flag", func() {
diff --git a/test/e2e/run_working_dir_test.go b/test/e2e/run_working_dir_test.go
index ac78110bf..bcc85dd9b 100644
--- a/test/e2e/run_working_dir_test.go
+++ b/test/e2e/run_working_dir_test.go
@@ -60,7 +60,7 @@ WORKDIR  /etc/foobar`, ALPINE)
 
 		session = podmanTest.Podman([]string{"run", "test", "ls", "-ld", "."})
 		session.WaitWithDefaultTimeout()
-		Expect(session.LineInOutputContains("bin")).To(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring("bin"))
 
 		session = podmanTest.Podman([]string{"run", "--workdir", "/home/foobar", "test", "pwd"})
 		session.WaitWithDefaultTimeout()
diff --git a/test/e2e/save_test.go b/test/e2e/save_test.go
index 0b3a88da3..9f3f750b7 100644
--- a/test/e2e/save_test.go
+++ b/test/e2e/save_test.go
@@ -253,8 +253,7 @@ func multiImageSave(podmanTest *PodmanTestIntegration, images []string) {
 	Expect(session).Should(Exit(0))
 	// Grep for each image in the `podman load` output.
 	for _, image := range images {
-		found, _ := session.GrepString(image)
-		Expect(found).Should(BeTrue())
+		Expect(session.OutputToString()).To(ContainSubstring(image))
 	}
 
 	// Make sure that each image has really been loaded.
diff --git a/test/e2e/search_test.go b/test/e2e/search_test.go
index 10e991d9f..2ea88eb5e 100644
--- a/test/e2e/search_test.go
+++ b/test/e2e/search_test.go
@@ -92,14 +92,14 @@ registries = ['{{.Host}}:{{.Port}}']`
 		search.WaitWithDefaultTimeout()
 		Expect(search).Should(Exit(0))
 		Expect(len(search.OutputToStringArray())).To(BeNumerically(">", 1))
-		Expect(search.LineInOutputContains("docker.io/library/alpine")).To(BeTrue())
+		Expect(search.OutputToString()).To(ContainSubstring("docker.io/library/alpine"))
 	})
 
 	It("podman search single registry flag", func() {
 		search := podmanTest.Podman([]string{"search", "quay.io/skopeo/stable:latest"})
 		search.WaitWithDefaultTimeout()
 		Expect(search).Should(Exit(0))
-		Expect(search.LineInOutputContains("quay.io/skopeo/stable")).To(BeTrue())
+		Expect(search.OutputToString()).To(ContainSubstring("quay.io/skopeo/stable"))
 	})
 
 	It("podman search image with description", func() {
@@ -127,7 +127,7 @@ registries = ['{{.Host}}:{{.Port}}']`
 		search.WaitWithDefaultTimeout()
 		Expect(search).Should(Exit(0))
 		Expect(len(search.OutputToStringArray())).To(BeNumerically(">", 1))
-		Expect(search.LineInOutputContains("docker.io/library/alpine")).To(BeTrue())
+		Expect(search.OutputToString()).To(ContainSubstring("docker.io/library/alpine"))
 	})
 
 	It("podman search format json", func() {
@@ -277,8 +277,7 @@ registries = ['{{.Host}}:{{.Port}}']`
 		searchEmpty.WaitWithDefaultTimeout()
 		Expect(searchEmpty).Should(Exit(0))
 		Expect(len(searchEmpty.OutputToStringArray())).To(BeNumerically(">=", 1))
-		match, _ := search.GrepString("my-alpine")
-		Expect(match).Should(BeTrue())
+		Expect(search.OutputToString()).To(ContainSubstring("my-alpine"))
 	})
 
 	It("podman search attempts HTTP if registry is in registries.insecure and force secure is false", func() {
@@ -317,8 +316,7 @@ registries = ['{{.Host}}:{{.Port}}']`
 		search.WaitWithDefaultTimeout()
 
 		Expect(search).Should(Exit(0))
-		match, _ := search.GrepString("my-alpine")
-		Expect(match).Should(BeTrue())
+		Expect(search.OutputToString()).To(ContainSubstring("my-alpine"))
 		Expect(search.ErrorToString()).Should(BeEmpty())
 
 		// cleanup
diff --git a/test/e2e/volume_create_test.go b/test/e2e/volume_create_test.go
index 3be1486d8..d1f769724 100644
--- a/test/e2e/volume_create_test.go
+++ b/test/e2e/volume_create_test.go
@@ -42,8 +42,7 @@ var _ = Describe("Podman volume create", func() {
 
 		check := podmanTest.Podman([]string{"volume", "ls", "-q"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString(volName)
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring(volName))
 		Expect(len(check.OutputToStringArray())).To(Equal(1))
 	})
 
@@ -55,8 +54,7 @@ var _ = Describe("Podman volume create", func() {
 
 		check := podmanTest.Podman([]string{"volume", "ls", "-q"})
 		check.WaitWithDefaultTimeout()
-		match, _ := check.GrepString(volName)
-		Expect(match).To(BeTrue())
+		Expect(check.OutputToString()).To(ContainSubstring(volName))
 		Expect(len(check.OutputToStringArray())).To(Equal(1))
 	})