diff --git a/contracts/test-utils/test/mocha_blockchain.ts b/contracts/test-utils/test/mocha_blockchain.ts
index e9404f6c3c..2f291781b1 100644
--- a/contracts/test-utils/test/mocha_blockchain.ts
+++ b/contracts/test-utils/test/mocha_blockchain.ts
@@ -29,7 +29,7 @@ blockchainTests('mocha blockchain extensions', env => {
                 });
             });
 
-            blockchainTests(/*.only*/ 'only', () => {
+            blockchainTests/*.only*/('only', () => {
                 it.skip("can't test `only` :-(", () => {
                     // no-op.
                 });