diff --git a/pf4j/src/test/java/org/pf4j/SingletonExtensionFactoryTest.java b/pf4j/src/test/java/org/pf4j/SingletonExtensionFactoryTest.java
index 1044034..739a76f 100644
--- a/pf4j/src/test/java/org/pf4j/SingletonExtensionFactoryTest.java
+++ b/pf4j/src/test/java/org/pf4j/SingletonExtensionFactoryTest.java
@@ -74,7 +74,7 @@ public class SingletonExtensionFactoryTest {
     private URL[] getClasspathReferences() throws MalformedURLException {
         String classpathProperty = System.getProperty("java.class.path");
 
-        String[] classpaths = classpathProperty.split(":");
+        String[] classpaths = classpathProperty.split(File.pathSeparator);
         URL[] uris = new URL[classpaths.length];
 
         for (int index = 0; index < classpaths.length; index++) {