diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 26e21f07c15..4f9e6a3f0e9 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1531,10 +1531,10 @@ module FourSlash {
             var actualDefinitionContainerName = definitions && definitions.length ? definitions[0].containerName : "";
             if (negative) {
                 assert.notEqual(actualDefinitionName, expectedName, this.messageAtLastKnownMarker("Definition Info Name"));
-                assert.notEqual(actualDefinitionName, expectedName, this.messageAtLastKnownMarker("Definition Info Container Name"));
+                assert.notEqual(actualDefinitionContainerName, expectedContainerName, this.messageAtLastKnownMarker("Definition Info Container Name"));
             } else {
                 assert.equal(actualDefinitionName, expectedName, this.messageAtLastKnownMarker("Definition Info Name"));
-                assert.equal(actualDefinitionName, expectedName, this.messageAtLastKnownMarker("Definition Info Container Name"));
+                assert.equal(actualDefinitionContainerName, expectedContainerName, this.messageAtLastKnownMarker("Definition Info Container Name"));
             }
         }