diff --git a/packages/ember-cli-code-coverage/lib/templates/test-body-footer.html b/packages/ember-cli-code-coverage/lib/templates/test-body-footer.html
index d9c61631..5c31e0ea 100644
--- a/packages/ember-cli-code-coverage/lib/templates/test-body-footer.html
+++ b/packages/ember-cli-code-coverage/lib/templates/test-body-footer.html
@@ -41,7 +41,7 @@
   }
 
   function handleCoverageResponse(xhr, callback) {
-    var data = xhr.response;
+    var data = JSON.parse(xhr.response);
 
     if (!data) {
       return;