diff --git a/expected.txt b/expected.txt
index a8f343b..396282b 100644
--- a/expected.txt
+++ b/expected.txt
@@ -1,9 +1,12 @@
 <?xml version="1.0"?>
-<testsuite name="Typescript type errors" tests="2" failures="2">
+<testsuite name="Typescript type errors" tests="3" failures="3">
   <testcase name="TS2551" classname="index.js:34:30">
     <failure type="TS2551" message="Property 'TracingDataset' does not exist on type 'Options'. Did you mean 'TracingDatase'?"/>
   </testcase>
   <testcase name="TS2345" classname="index.test.js:52:5">
     <failure type="TS2345" message="Argument of type '{ APIHost: string; APIKey: string; GlobalMetadata: { global: string; }; DesiredSampleRate: number; TracingDataset: string; }' is not assignable to parameter of type 'Options | &quot;mock&quot;'."/>
   </testcase>
+  <testcase name="TS2688" classname="N/A:N/A:N/A">
+    <failure type="TS2688" message="Cannot find type definition file for 'ember__test-helpers'."/>
+  </testcase>
 </testsuite>
diff --git a/sample.txt b/sample.txt
index 881f10e..e72d968 100644
--- a/sample.txt
+++ b/sample.txt
@@ -1,3 +1,4 @@
 index.js(34,30): error TS2551: Property 'TracingDataset' does not exist on type 'Options'. Did you mean 'TracingDatase'?
 index.test.js(52,5): error TS2345: Argument of type '{ APIHost: string; APIKey: string; GlobalMetadata: { global: string; }; DesiredSampleRate: number; TracingDataset: string; }' is not assignable to parameter of type 'Options | "mock"'.
   Object literal may only specify known properties, but 'TracingDataset' does not exist in type 'Options'. Did you mean to write 'TracingDatase'?
+error TS2688: Cannot find type definition file for 'ember__test-helpers'.
\ No newline at end of file