diff --git a/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionImpl.java b/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionImpl.java
index 86e286f..14064c1 100644
--- a/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionImpl.java
+++ b/cas-client-core/src/main/java/org/jasig/cas/client/validation/AssertionImpl.java
@@ -101,26 +101,32 @@ public final class AssertionImpl implements Assertion {
         CommonUtils.assertNotNull(this.attributes, "attributes cannot be null.");
     }
 
+    @Override
     public Date getAuthenticationDate() {
         return this.authenticationDate;
     }
 
+    @Override
     public Date getValidFromDate() {
         return this.validFromDate;
     }
 
+    @Override
     public Date getValidUntilDate() {
         return this.validUntilDate;
     }
 
+    @Override
     public Map<String, Object> getAttributes() {
         return this.attributes;
     }
 
+    @Override
     public AttributePrincipal getPrincipal() {
         return this.principal;
     }
 
+    @Override
     public boolean isValid() {
         if (this.validFromDate == null) {
             return true;
diff --git a/cas-client-core/src/test/java/org/jasig/cas/client/validation/AssertionImplTests.java b/cas-client-core/src/test/java/org/jasig/cas/client/validation/AssertionImplTests.java
index de6e856..b175523 100644
--- a/cas-client-core/src/test/java/org/jasig/cas/client/validation/AssertionImplTests.java
+++ b/cas-client-core/src/test/java/org/jasig/cas/client/validation/AssertionImplTests.java
@@ -49,6 +49,11 @@ public final class AssertionImplTests extends TestCase {
         assertNull(assertion.getPrincipal().getProxyTicketFor("test"));
     }
 
+    public void testAssertionValidity() throws Exception {
+        final Assertion assertion = new AssertionImpl(CONST_PRINCIPAL, CONST_ATTRIBUTES);
+        assertTrue(assertion.isValid());
+    }
+    
     public void testCompleteConstructor() {
         final Assertion assertion = new AssertionImpl(CONST_PRINCIPAL, CONST_ATTRIBUTES);