diff --git oak-core/src/test/java/org/apache/jackrabbit/oak/security/user/UserManagerImplTest.java oak-core/src/test/java/org/apache/jackrabbit/oak/security/user/UserManagerImplTest.java
index bc29c4e..f1bc23d 100644
--- oak-core/src/test/java/org/apache/jackrabbit/oak/security/user/UserManagerImplTest.java
+++ oak-core/src/test/java/org/apache/jackrabbit/oak/security/user/UserManagerImplTest.java
@@ -91,34 +91,16 @@ public class UserManagerImplTest extends AbstractSecurityTest {
     }
 
     @Test
-    public void testSetPassword() throws Exception {
-        User user = userMgr.createUser(testUserId, "pw");
-        root.commit();
-
-        List<String> pwds = new ArrayList<String>();
-        pwds.add("pw");
-        pwds.add("");
-        pwds.add("{sha1}pw");
-
-        Tree userTree = root.getTree(user.getPath());
-        for (String pw : pwds) {
-            userMgr.setPassword(userTree, testUserId, pw, true);
-            String pwHash = userTree.getProperty(UserConstants.REP_PASSWORD).getValue(Type.STRING);
-            assertNotNull(pwHash);
-            assertTrue(PasswordUtil.isSame(pwHash, pw));
-        }
+    public void testGetAuthorizableDoesNotThrowIAEOnEmptyString() throws Exception {
+        // in Jackrabbit it used to throw a IAE
+        userMgr.getAuthorizable("");
+    }
 
-        for (String pw : pwds) {
-            userMgr.setPassword(userTree, testUserId, pw, false);
-            String pwHash = userTree.getProperty(UserConstants.REP_PASSWORD).getValue(Type.STRING);
-            assertNotNull(pwHash);
-            if (!pw.startsWith("{")) {
-                assertTrue(PasswordUtil.isSame(pwHash, pw));
-            } else {
-                assertFalse(PasswordUtil.isSame(pwHash, pw));
-                assertEquals(pw, pwHash);
-            }
-        }
+    @Test
+    public void testGetAuthorizableDoesNotThrowIAEOnNull() throws Exception {
+        // in Jackrabbit it used to throw a IAE
+        // in Oak it throws a NPE
+        userMgr.getAuthorizable((String) null);
     }
 
     @Test