diff --git a/cmd/nerdctl/image_list_test.go b/cmd/nerdctl/image_list_test.go
index 15ea97c82b0..1b07841fcec 100644
--- a/cmd/nerdctl/image_list_test.go
+++ b/cmd/nerdctl/image_list_test.go
@@ -101,11 +101,11 @@ LABEL version=0.1`, testutil.CommonImage)
 	base.Cmd("pull", busyboxUclibc).AssertOK()
 	defer base.Cmd("rmi", busyboxUclibc).AssertOK()
 
-	base.Cmd("images", "--filter", fmt.Sprintf("before=%s:%s", tempName, "latest")).AssertOutContains(strings.Split(testutil.CommonImage, ":")[0])
+	base.Cmd("images", "--filter", fmt.Sprintf("before=%s:%s", tempName, "latest")).AssertOutContains(testutil.ImageRepo(testutil.CommonImage))
 	base.Cmd("images", "--filter", fmt.Sprintf("before=%s:%s", tempName, "latest")).AssertOutNotContains(tempName)
 	base.Cmd("images", "--filter", fmt.Sprintf("since=%s", testutil.CommonImage)).AssertOutContains(tempName)
-	base.Cmd("images", "--filter", fmt.Sprintf("since=%s", testutil.CommonImage)).AssertOutNotContains(strings.Split(testutil.CommonImage, ":")[0])
-	base.Cmd("images", "--filter", fmt.Sprintf("since=%s", testutil.CommonImage), testutil.CommonImage).AssertOutNotContains(strings.Split(testutil.CommonImage, ":")[0])
+	base.Cmd("images", "--filter", fmt.Sprintf("since=%s", testutil.CommonImage)).AssertOutNotContains(testutil.ImageRepo(testutil.CommonImage))
+	base.Cmd("images", "--filter", fmt.Sprintf("since=%s", testutil.CommonImage), testutil.CommonImage).AssertOutNotContains(testutil.ImageRepo(testutil.CommonImage))
 	base.Cmd("images", "--filter", fmt.Sprintf("since=%s", testutil.CommonImage), testutil.CommonImage).AssertOutNotContains(tempName)
 	base.Cmd("images", "--filter", "label=foo=bar").AssertOutContains(tempName)
 	base.Cmd("images", "--filter", "label=foo=bar1").AssertOutNotContains(tempName)
diff --git a/cmd/nerdctl/image_load_linux_test.go b/cmd/nerdctl/image_load_linux_test.go
index 613ad17d04f..0f620363a19 100644
--- a/cmd/nerdctl/image_load_linux_test.go
+++ b/cmd/nerdctl/image_load_linux_test.go
@@ -47,7 +47,7 @@ func TestLoadStdinFromPipe(t *testing.T) {
 	assert.NilError(t, err)
 
 	assert.Assert(t, strings.Contains(string(fb), fmt.Sprintf("Loaded image: %s:latest", img)))
-	base.Cmd("images").AssertOutContains(strings.Split(img, ":")[0])
+	base.Cmd("images").AssertOutContains(testutil.ImageRepo(testutil.CommonImage))
 }
 
 func TestLoadStdinEmpty(t *testing.T) {
diff --git a/cmd/nerdctl/image_remove_linux_test.go b/cmd/nerdctl/image_remove_linux_test.go
index ecc55b435f9..efb43adb046 100644
--- a/cmd/nerdctl/image_remove_linux_test.go
+++ b/cmd/nerdctl/image_remove_linux_test.go
@@ -37,7 +37,7 @@ func TestRemoveImage(t *testing.T) {
 	defer base.Cmd("rmi", "-f", testutil.CommonImage).Run()
 	base.Cmd("rmi", "-f", testutil.CommonImage).AssertOK()
 
-	base.Cmd("images").AssertNoOut(testutil.CommonImage)
+	base.Cmd("images").AssertNoOut(testutil.ImageRepo(testutil.CommonImage))
 }
 
 func TestRemoveRunningImage(t *testing.T) {
@@ -49,5 +49,5 @@ func TestRemoveRunningImage(t *testing.T) {
 	base.Cmd("kill", tID).AssertOK()
 	base.Cmd("rmi", testutil.CommonImage).AssertFail()
 	base.Cmd("rmi", "-f", testutil.CommonImage).AssertOK()
-	base.Cmd("images").AssertNoOut(testutil.CommonImage)
+	base.Cmd("images").AssertNoOut(testutil.ImageRepo(testutil.CommonImage))
 }
diff --git a/cmd/nerdctl/system_prune_linux_test.go b/cmd/nerdctl/system_prune_linux_test.go
index da86a11d13a..361698d0954 100644
--- a/cmd/nerdctl/system_prune_linux_test.go
+++ b/cmd/nerdctl/system_prune_linux_test.go
@@ -52,13 +52,13 @@ func TestSystemPrune(t *testing.T) {
 	defer base.Cmd("rm", "-f", tID).Run()
 
 	base.Cmd("ps", "-a").AssertOutContains(tID)
-	base.Cmd("images").AssertOutContains("alpine")
+	base.Cmd("images").AssertOutContains(testutil.ImageRepo(testutil.CommonImage))
 
 	base.Cmd("system", "prune", "-f", "--volumes", "--all").AssertOK()
 	base.Cmd("volume", "ls").AssertNoOut(vID)
 	base.Cmd("ps", "-a").AssertNoOut(tID)
 	base.Cmd("network", "ls").AssertNoOut(nID)
-	base.Cmd("images").AssertNoOut("alpine")
+	base.Cmd("images").AssertNoOut(testutil.ImageRepo(testutil.CommonImage))
 
 	if testutil.GetTarget() != testutil.Nerdctl {
 		t.Skip("test skipped for buildkitd is not available with docker-compatible tests")
diff --git a/pkg/testutil/testutil.go b/pkg/testutil/testutil.go
index 69c15ad9027..e26b56d0b18 100644
--- a/pkg/testutil/testutil.go
+++ b/pkg/testutil/testutil.go
@@ -32,6 +32,7 @@ import (
 	"github.com/Masterminds/semver/v3"
 	"github.com/containerd/containerd/defaults"
 	"github.com/containerd/nerdctl/pkg/buildkitutil"
+	"github.com/containerd/nerdctl/pkg/imgutil"
 	"github.com/containerd/nerdctl/pkg/infoutil"
 	"github.com/containerd/nerdctl/pkg/inspecttypes/dockercompat"
 	"github.com/containerd/nerdctl/pkg/inspecttypes/native"
@@ -684,3 +685,10 @@ func Identifier(t testing.TB) string {
 	}
 	return s
 }
+
+// ImageRepo returns the image repo that can be used to, e.g, validate output
+// from `nerdctl images`.
+func ImageRepo(s string) string {
+	repo, _ := imgutil.ParseRepoTag(s)
+	return repo
+}