keycloak-aplcache

diff --git a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/oauth/OIDCProtocolMappersTest.java b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/oauth/OIDCProtocolMappersTest.java
index d281196..61d8945 100644
--- a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/oauth/OIDCProtocolMappersTest.java
+++ b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/oauth/OIDCProtocolMappersTest.java
@@ -52,7 +52,7 @@ import static org.hamcrest.Matchers.containsInAnyOrder;
 import static org.hamcrest.Matchers.hasItems;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.is;
-import static org.hamcrest.Matchers.isEmptyString;
+import static org.hamcrest.Matchers.isEmptyOrNullString;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
@@ -266,7 +266,7 @@ public class OIDCProtocolMappersTest extends AbstractKeycloakTest {
 
             IDToken idToken = oauth.verifyIDToken(response.getIdToken());
             Object empty = idToken.getOtherClaims().get("empty");
-            assertThat((empty == null ? null : (String) empty), isEmptyString());
+            assertThat((empty == null ? null : (String) empty), isEmptyOrNullString());
             Object nulll = idToken.getOtherClaims().get("null");
             assertNull(nulll);