diff --git a/test/e2e/framework/util.go b/test/e2e/framework/util.go
index 2f8376d8e07..ea9d93f9457 100644
--- a/test/e2e/framework/util.go
+++ b/test/e2e/framework/util.go
@@ -224,11 +224,9 @@ func DeleteNamespaces(c clientset.Interface, deleteFilter, skipFilter []string)
 	var wg sync.WaitGroup
 OUTER:
 	for _, item := range nsList.Items {
-		if skipFilter != nil {
-			for _, pattern := range skipFilter {
-				if strings.Contains(item.Name, pattern) {
-					continue OUTER
-				}
+		for _, pattern := range skipFilter {
+			if strings.Contains(item.Name, pattern) {
+				continue OUTER
 			}
 		}
 		if deleteFilter != nil {
diff --git a/test/e2e_node/services/services.go b/test/e2e_node/services/services.go
index e0af8d2aa09..3eb56fe1ac3 100644
--- a/test/e2e_node/services/services.go
+++ b/test/e2e_node/services/services.go
@@ -93,12 +93,10 @@ func (e *E2EServices) Stop() {
 			klog.Errorf("Failed to stop kubelet: %v", err)
 		}
 	}
-	if e.rmDirs != nil {
-		for _, d := range e.rmDirs {
-			err := os.RemoveAll(d)
-			if err != nil {
-				klog.Errorf("Failed to delete directory %s: %v", d, err)
-			}
+	for _, d := range e.rmDirs {
+		err := os.RemoveAll(d)
+		if err != nil {
+			klog.Errorf("Failed to delete directory %s: %v", d, err)
 		}
 	}
 }
diff --git a/test/integration/apiserver/admissionwebhook/reinvocation_test.go b/test/integration/apiserver/admissionwebhook/reinvocation_test.go
index 8688cb67ac1..40db2ea198c 100644
--- a/test/integration/apiserver/admissionwebhook/reinvocation_test.go
+++ b/test/integration/apiserver/admissionwebhook/reinvocation_test.go
@@ -447,11 +447,9 @@ func testWebhookReinvocationPolicy(t *testing.T, watchCache bool) {
 				}
 			}
 
-			if tt.expectInvocations != nil {
-				for k, v := range tt.expectInvocations {
-					if recorder.GetCount(k) != v {
-						t.Errorf("expected %d invocations of %s, but got %d", v, k, recorder.GetCount(k))
-					}
+			for k, v := range tt.expectInvocations {
+				if recorder.GetCount(k) != v {
+					t.Errorf("expected %d invocations of %s, but got %d", v, k, recorder.GetCount(k))
 				}
 			}