diff --git a/tests/lib/asset.test.js b/tests/lib/asset.test.js
index b97ac70..389a616 100644
--- a/tests/lib/asset.test.js
+++ b/tests/lib/asset.test.js
@@ -25,7 +25,7 @@
     })
 
     it('asset.data should be a binary Buffer', function() {
-        asset.data.should.be.a.buffer
+        asset.data.should.be.a.buffer()
     })
 
     it('asset.contentType should be inferred from Buffer', function() {
@@ -53,7 +53,7 @@
     })
 
     it('asset.data should be a binary Buffer', function() {
-        asset.data.should.be.a.buffer
+        asset.data.should.be.a.buffer()
     })
 
     it('asset.contentType should be inferred from Buffer', function() {