Wrap after

plugins/c9.ide.preferences/preferences_test.js

@@ -185,10 +185,12 @@ require([
                });
            });
            
+           if (!onload.remain) {
                after(function(done) {
                    document.body.style.marginBottom = "";
                    done();
                });
+           }
         });
         
         onload && onload();