diff --git a/staging/src/k8s.io/component-base/logs/json/json_test.go b/staging/src/k8s.io/component-base/logs/json/json_test.go
index 76082a6309d..30c3cc3e48d 100644
--- a/staging/src/k8s.io/component-base/logs/json/json_test.go
+++ b/staging/src/k8s.io/component-base/logs/json/json_test.go
@@ -65,6 +65,11 @@ func TestZapLoggerInfo(t *testing.T) {
 			names:  []string{"hello", "world"},
 			format: "{\"ts\":%f,\"logger\":\"hello.world\",\"caller\":\"json/json_test.go:%d\",\"msg\":\"test for WithName\",\"v\":0}\n",
 		},
+		{
+			msg:        "test for duplicate keys",
+			format:     "{\"ts\":%f,\"caller\":\"json/json_test.go:%d\",\"msg\":\"test for duplicate keys\",\"v\":0,\"akey\":\"avalue\",\"akey\":\"anothervalue\"}\n",
+			keysValues: []interface{}{"akey", "avalue", "akey", "anothervalue"},
+		},
 	}
 
 	for _, data := range testDataInfo {