--- a/dom/bindings/test/test_exceptions_from_jsimplemented.html
+++ b/dom/bindings/test/test_exceptions_from_jsimplemented.html
@@ -28,17 +28,17 @@ https://bugzilla.mozilla.org/show_bug.cg
     });
   } catch (e) {
     // b2g has no WebRTC, apparently
     todo(false, "No WebRTC on b2g yet");
   }
 
   conn.close();
   try {
-      conn.setIdentityProvider("example.com", "foo");
+      conn.setIdentityProvider("example.com", { protocol: "foo" });
       ok(false, "That call to setIdentityProvider should have thrown");
     } catch (e) {
       is(e.lineNumber, 36, "Exception should have been on line 36");
       is(e.message,
          "Peer connection is closed",
          "Should have the exception we expect");
     }