--- a/cubicweb/test/unittest_uilib.py	Thu Jan 12 13:40:25 2017 +0100
+++ b/cubicweb/test/unittest_uilib.py	Fri Jan 20 03:54:43 2017 +0100
@@ -174,8 +174,10 @@
                           'cw.pouet(1,"2").pouet(null)')
         self.assertEqual(str(uilib.js.cw.pouet(1, cwutils.JSString("$")).pouet(None)),
                          'cw.pouet(1,$).pouet(null)')
-        self.assertEqual(str(uilib.js.cw.pouet(1, {'callback': cwutils.JSString("cw.cb")}).pouet(None)),
-                         'cw.pouet(1,{callback: cw.cb}).pouet(null)')
+        self.assertEqual(
+            str(uilib.js.cw.pouet(
+                1, {'call back': cwutils.JSString("cw.cb")}).pouet(None)),
+            'cw.pouet(1,{"call back": cw.cb}).pouet(null)')
 
 
     def test_embedded_css(self):

--- a/cubicweb/utils.py	Thu Jan 12 13:40:25 2017 +0100
+++ b/cubicweb/utils.py	Fri Jan 20 03:54:43 2017 +0100
@@ -534,7 +534,7 @@
         it = sorted(d.items())
     else:
         it = d.items()
-    res = [key + ': ' + js_dumps(val, predictable)
+    res = [js_dumps(key, predictable) + ': ' + js_dumps(val, predictable)
            for key, val in it]
     return '{%s}' % ', '.join(res)
 

--- a/cubicweb/web/test/unittest_web.py	Thu Jan 12 13:40:25 2017 +0100
+++ b/cubicweb/web/test/unittest_web.py	Fri Jan 20 03:54:43 2017 +0100
@@ -51,7 +51,7 @@
         cbname = url.split()[1][:-2]
         self.assertMultiLineEqual(
             'function %s() { $("#foo").loadxhtml("http://testing.fr/cubicweb/ajax?%s",'
-            '{pageid: "%s"},"get","replace"); }' %
+            '{"pageid": "%s"},"get","replace"); }' %
             (cbname, qs, req.pageid),
             req.html_headers.post_inlined_scripts[0])