diff --git a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractSAMLServletsAdapterTest.java b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractSAMLServletsAdapterTest.java
index 2d5645a104..2bdabc9870 100644
--- a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractSAMLServletsAdapterTest.java
+++ b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractSAMLServletsAdapterTest.java
@@ -478,4 +478,21 @@ public abstract class AbstractSAMLServletsAdapterTest extends AbstractServletsAd
 
         employee2ServletPage.logout();
     }
+
+    @Test
+    public void idpInitiatedUnauthorizedLoginTest() {
+        samlidpInitiatedLogin.setAuthRealm(SAMLSERVLETDEMO);
+        samlidpInitiatedLogin.setUrlName("employee2");
+        samlidpInitiatedLogin.navigateTo();
+        samlidpInitiatedLogin.form().login("unauthorized","password");
+
+        assertFalse(driver.getPageSource().contains("principal="));
+        assertTrue(driver.getPageSource().contains("Forbidden") || driver.getPageSource().contains("Status 403"));
+
+        employee2ServletPage.navigateTo();
+        assertFalse(driver.getPageSource().contains("principal="));
+        assertTrue(driver.getPageSource().contains("Forbidden") || driver.getPageSource().contains("Status 403"));
+
+        employee2ServletPage.logout();
+    }
 }