diff --git a/caps/tests/mochitest/test_principal_extendedorigin_appid_appstatus.html b/caps/tests/mochitest/test_principal_extendedorigin_appid_appstatus.html
index e56ba41f5d0f..cfe6b866e81f 100644
--- a/caps/tests/mochitest/test_principal_extendedorigin_appid_appstatus.html
+++ b/caps/tests/mochitest/test_principal_extendedorigin_appid_appstatus.html
@@ -23,7 +23,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=758258
 var Ci = Components.interfaces;
 
 if (navigator.platform.startsWith("Linux")) {
-  SimpleTest.expectAssertions(2);
+  SimpleTest.expectAssertions(2, 4);
 }
 
 SimpleTest.waitForExplicitFinish();
diff --git a/layout/xul/base/test/test_bug393970.xul b/layout/xul/base/test/test_bug393970.xul
index f2abdcaea32e..fcb0f9e43a35 100644
--- a/layout/xul/base/test/test_bug393970.xul
+++ b/layout/xul/base/test/test_bug393970.xul
@@ -50,6 +50,10 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=393970
   <script type="application/javascript"><![CDATA[
     /** Test for Bug 393970 **/
 
+    if (navigator.platform.startsWith("Linux")) {
+      SimpleTest.expectAssertions(0, 24);
+    }
+
     var tests = [
       'overflow-x: hidden; overflow-y: hidden;',
       'overflow-x: scroll; overflow-y: hidden;',