diff --git a/packages/vhd-lib/src/vhd.js b/packages/vhd-lib/src/vhd.js
index 4798dafee..2a8ebd6de 100644
--- a/packages/vhd-lib/src/vhd.js
+++ b/packages/vhd-lib/src/vhd.js
@@ -98,7 +98,7 @@ export default class Vhd {
       Buffer.alloc(n),
       start
     )
-    assert.equal(bytesRead, n)
+    assert.strictEqual(bytesRead, n)
     return buffer
   }