diff --git a/test/completeTest.js b/test/completeTest.js
index 714a2453..f947d1b3 100644
--- a/test/completeTest.js
+++ b/test/completeTest.js
@@ -17,6 +17,10 @@ describe('complete', function() {
     boss.stop().then(() => finished());
   });
 
+  it('should reject missing id argument', function(finished){
+    boss.onComplete().catch(() => finished());
+  });
+
   it('should subscribe to the response on a complete call', function(finished){
 
     const jobName = 'part-of-something-important';
diff --git a/test/fetchTest.js b/test/fetchTest.js
index 8a0af699..4d41673f 100644
--- a/test/fetchTest.js
+++ b/test/fetchTest.js
@@ -17,6 +17,10 @@ describe('fetch', function(){
     boss.stop().then(() => finished());
   });
 
+  it('should reject missing id argument', function(finished){
+    boss.fetch().catch(() => finished());
+  });
+
   it('should fetch a single job by name and manually complete', function(finished) {
     let jobName = 'no-subscribe-required';