diff --git a/plugin/src/main/java/com/arcbees/chosen/client/resources/css/chosen.gss b/plugin/src/main/java/com/arcbees/chosen/client/resources/css/chosen.gss
index 5030971..06d735b 100644
--- a/plugin/src/main/java/com/arcbees/chosen/client/resources/css/chosen.gss
+++ b/plugin/src/main/java/com/arcbees/chosen/client/resources/css/chosen.gss
@@ -507,5 +507,7 @@
     right: -9000px;
 }
 
-.chzn-done {
-}
+.chzn-done {}
+.is-open {}
+.chzn-results-holder {}
+.chzn-mobile-container {}
diff --git a/sample/pom.xml b/sample/pom.xml
index f1e90a2..da56999 100644
--- a/sample/pom.xml
+++ b/sample/pom.xml
@@ -48,6 +48,7 @@
                     <!-- With multiple tests use GwtTestSuite.java for speed -->
                     <!-- <includes>**/*GwtTestSuite.java</includes> -->
                     <includes>**/*GwtTest.java</includes>
+                    <strict>true</strict>
 
                     <extraJvmArgs>-Xss1024k -Xmx1024m -XX:MaxPermSize=256m -Duser.country="US" -Duser.language="en"</extraJvmArgs>
                     <logLevel>${gwt.loglevel}</logLevel>