--- a/tests/src/createItem.test.ts
+++ b/tests/src/createItem.test.ts
@@ -158,7 +158,7 @@
 
       const newCollectionID = await createCollectionWithPropsExpectSuccess();
       
-      createItemWithPropsExpectFailure(alice, newCollectionID, 'NFT', prps);
+      await createItemWithPropsExpectFailure(alice, newCollectionID, 'NFT', prps);
     });
   });
 
@@ -166,7 +166,7 @@
     await usingApi(async () => {
       const newCollectionID = await createCollectionWithPropsExpectSuccess();
       
-      createItemWithPropsExpectFailure(alice, newCollectionID, 'NFT', [{key: 'k', value: 'vvvvvv'.repeat(5000)}, {key: 'k2', value: 'vvv'.repeat(5000)}]);
+      await createItemWithPropsExpectFailure(alice, newCollectionID, 'NFT', [{key: 'k', value: 'vvvvvv'.repeat(5000)}, {key: 'k2', value: 'vvv'.repeat(5000)}]);
     });
   });
 });
--- a/tests/src/nesting/unnest.test.ts
+++ b/tests/src/nesting/unnest.test.ts
@@ -153,6 +153,6 @@
 
     // Create a nested token ouroboros
     const nestedToken = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: tokenIdToAddress(collection, targetToken)});
-    expect(transferExpectSuccess(collection, targetToken, alice, {Ethereum: tokenIdToAddress(collection, nestedToken)})).to.be.rejectedWith(/^structure\.OuroborosDetected$/);
+    await expect(transferExpectSuccess(collection, targetToken, alice, {Ethereum: tokenIdToAddress(collection, nestedToken)})).to.be.rejectedWith(/^structure\.OuroborosDetected$/);
   });
 });