diff --git a/test/extended/images/prune.go b/test/extended/images/prune.go
index 1166645bb996..b32ff0ece429 100644
--- a/test/extended/images/prune.go
+++ b/test/extended/images/prune.go
@@ -41,7 +41,7 @@ var _ = g.Describe("[images] prune images", func() {
 		o.Expect(err).NotTo(o.HaveOccurred())
 
 		g.By(fmt.Sprintf("give a user %s a right to prune images with %s role", oc.Username(), "system:image-pruner"))
-		err = oc.AsAdmin().Run("adm").Args("policy", "add-cluster-role-to-user", "system:image-pruner", oc.Username()).Execute()
+		err = oc.AsAdmin().WithoutNamespace().Run("adm").Args("policy", "add-cluster-role-to-user", "system:image-pruner", oc.Username()).Execute()
 		o.Expect(err).NotTo(o.HaveOccurred())
 	})
 
@@ -126,7 +126,7 @@ func testPruneImages(oc *exutil.CLI, schemaVersion int) {
 	o.Expect(imgKeep.DockerImageManifestMediaType).To(o.Equal(mediaType))
 
 	g.By("prune the first image uploaded (dry-run)")
-	output, err := oc.Run("adm").Args("prune", "images", "--keep-tag-revisions=1", "--keep-younger-than=0").Output()
+	output, err := oc.WithoutNamespace().Run("adm").Args("prune", "images", "--keep-tag-revisions=1", "--keep-younger-than=0").Output()
 
 	g.By("verify images, layers and configs about to be pruned")
 	o.Expect(output).To(o.ContainSubstring(imgPruneName))
@@ -154,7 +154,7 @@ func testPruneImages(oc *exutil.CLI, schemaVersion int) {
 	o.Expect(noConfirmSize).To(o.Equal(keepSize))
 
 	g.By("prune the first image uploaded (confirm)")
-	output, err = oc.Run("adm").Args("prune", "images", "--keep-tag-revisions=1", "--keep-younger-than=0", "--confirm").Output()
+	output, err = oc.WithoutNamespace().Run("adm").Args("prune", "images", "--keep-tag-revisions=1", "--keep-younger-than=0", "--confirm").Output()
 
 	g.By("verify images, layers and configs about to be pruned")
 	o.Expect(output).To(o.ContainSubstring(imgPruneName))
diff --git a/test/extended/util/cli.go b/test/extended/util/cli.go
index 1a6ea8331d94..4efbf717e74d 100644
--- a/test/extended/util/cli.go
+++ b/test/extended/util/cli.go
@@ -32,21 +32,22 @@ import (
 // CLI provides function to call the OpenShift CLI and Kubernetes and OpenShift
 // REST clients.
 type CLI struct {
-	execPath        string
-	verb            string
-	configPath      string
-	adminConfigPath string
-	username        string
-	outputDir       string
-	globalArgs      []string
-	commandArgs     []string
-	finalArgs       []string
-	stdin           *bytes.Buffer
-	stdout          io.Writer
-	stderr          io.Writer
-	verbose         bool
-	cmd             *cobra.Command
-	kubeFramework   *e2e.Framework
+	execPath         string
+	verb             string
+	configPath       string
+	adminConfigPath  string
+	username         string
+	outputDir        string
+	globalArgs       []string
+	commandArgs      []string
+	finalArgs        []string
+	stdin            *bytes.Buffer
+	stdout           io.Writer
+	stderr           io.Writer
+	verbose          bool
+	withoutNamespace bool
+	cmd              *cobra.Command
+	kubeFramework    *e2e.Framework
 }
 
 // NewCLI initialize the upstream E2E framework and set the namespace to match
@@ -129,6 +130,12 @@ func (c *CLI) SetNamespace(ns string) *CLI {
 	return c
 }
 
+// WithoutNamespace instructs the command should be invoked without adding --namespace parameter
+func (c *CLI) WithoutNamespace() *CLI {
+	c.withoutNamespace = true
+	return c
+}
+
 // SetOutputDir change the default output directory for temporary files
 func (c *CLI) SetOutputDir(dir string) *CLI {
 	c.outputDir = dir
@@ -239,10 +246,12 @@ func (c *CLI) Run(commands ...string) *CLI {
 		username:        c.username,
 		outputDir:       c.outputDir,
 		globalArgs: append(commands, []string{
-			fmt.Sprintf("--namespace=%s", c.Namespace()),
 			fmt.Sprintf("--config=%s", c.configPath),
 		}...),
 	}
+	if !c.withoutNamespace {
+		nc.globalArgs = append(nc.globalArgs, fmt.Sprintf("--namespace=%s", c.Namespace()))
+	}
 	nc.stdin, nc.stdout, nc.stderr = in, out, errout
 	return nc.setOutput(c.stdout)
 }