diff --git a/test/integration/helpers.js b/test/integration/helpers.js
index 9f26ad9..bb27232 100644
--- a/test/integration/helpers.js
+++ b/test/integration/helpers.js
@@ -385,12 +385,13 @@ var stubAddressActivityFailsOn = null;
 var stubAddressActivityFailsOnCount=1;
 helpers.stubAddressActivity = function(activeAddresses, failsOn) {
 
-  if (failsOn) {
-    stubAddressActivityFailsOn = failsOn;
-  }
+  stubAddressActivityFailsOnCount=1;
+
+  // could be null
+  stubAddressActivityFailsOn = failsOn;
 
   blockchainExplorer.getAddressActivity = function(address, cb) {
-    if (stubAddressActivityFailsOnCount == stubAddressActivityFailsOn) 
+    if (stubAddressActivityFailsOnCount === stubAddressActivityFailsOn) 
       return cb('failed on request');
 
     stubAddressActivityFailsOnCount++;