diff --git a/client/karma.js b/client/karma.js
index ec0db417e..efc48dc30 100644
--- a/client/karma.js
+++ b/client/karma.js
@@ -131,7 +131,7 @@ function Karma (socket, iframe, opener, navigator, location, document) {
   }
 
   this.onbeforeunload = function () {
-    if (!karmaNavigating) {
+    if (karmaNavigating) {
       // TODO(vojta): show what test (with explanation about jasmine.UPDATE_INTERVAL)
       self.error('Some of your tests did a full page reload!')
     }
diff --git a/static/karma.js b/static/karma.js
index bc3a2bbb6..709610af4 100644
--- a/static/karma.js
+++ b/static/karma.js
@@ -141,7 +141,7 @@ function Karma (socket, iframe, opener, navigator, location, document) {
   }
 
   this.onbeforeunload = function () {
-    if (!karmaNavigating) {
+    if (karmaNavigating) {
       // TODO(vojta): show what test (with explanation about jasmine.UPDATE_INTERVAL)
       self.error('Some of your tests did a full page reload!')
     }