diff --git a/pmd-test/src/main/resources/rule-tests_1_0_0.xsd b/pmd-test/src/main/resources/rule-tests_1_0_0.xsd
index f7b939ce00..4b1a7a6a5c 100644
--- a/pmd-test/src/main/resources/rule-tests_1_0_0.xsd
+++ b/pmd-test/src/main/resources/rule-tests_1_0_0.xsd
@@ -50,7 +50,7 @@
             <element name="source-type" minOccurs="0" default="java">
                 <simpleType>
                     <restriction base="string">
-                        <pattern value="(apex|ecmascript|java|jsp|modelica|plsql|pom|scala|vf|vm|wsdl|xml|xsl)( [\w\d_-]+)?"></pattern>
+                        <pattern value="(apex|ecmascript|java|jsp|modelica|plsql|pom|scala|vf|vm|wsdl|xml|xsl)( [\w\d._-]+)?"></pattern>
                     </restriction>
                 </simpleType>
             </element>