diff --git a/implementations/javascript/test/test-codec.js b/implementations/javascript/test/test-codec.js
index 50a92fb..6079c06 100644
--- a/implementations/javascript/test/test-codec.js
+++ b/implementations/javascript/test/test-codec.js
@@ -203,6 +203,7 @@ describe('common test suite', () => {
               assert.fail("but it didn't");
             } catch (e) {
               assert(e instanceof DecodeError);
+              assert(!(e instanceof ShortPacket));
             }
           });
         });