diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index eae34cfc082..19ea8927910 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -376,7 +376,7 @@ module FourSlash {
         }
 
         private getFileContent(fileName: string): string {
-            var script = this.languageServiceAdaptorHost.getScriptInfo(this.activeFile.fileName);
+            var script = this.languageServiceAdaptorHost.getScriptInfo(fileName);
             return script.content;
         }