diff --git a/bundles/org.eclipse.equinox.http.servlet.tests/src/org/eclipse/equinox/http/servlet/tests/DispatchingTest.java b/bundles/org.eclipse.equinox.http.servlet.tests/src/org/eclipse/equinox/http/servlet/tests/DispatchingTest.java
index f1fbf291290..6c63301b2f8 100644
--- a/bundles/org.eclipse.equinox.http.servlet.tests/src/org/eclipse/equinox/http/servlet/tests/DispatchingTest.java
+++ b/bundles/org.eclipse.equinox.http.servlet.tests/src/org/eclipse/equinox/http/servlet/tests/DispatchingTest.java
@@ -1284,7 +1284,7 @@ public void run() {
 
 	@Test
 	public void test_headers_include() throws Exception {
-		SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz");
+		SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.ENGLISH);
 		format.setTimeZone(TimeZone.getTimeZone("GMT"));
 		final long date1 = System.currentTimeMillis() - (1000*60*60*24*365*30);
 		final long date2 = System.currentTimeMillis() - (1000*60*60*24*365*40);
@@ -1358,7 +1358,7 @@ protected void service(HttpServletRequest request, HttpServletResponse response)
 
 	@Test
 	public void test_headers_forward() throws Exception {
-		SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz");
+		SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.ENGLISH);
 		format.setTimeZone(TimeZone.getTimeZone("GMT"));
 		final long date1 = System.currentTimeMillis() - (1000*60*60*24*365*30);
 		final long date2 = System.currentTimeMillis() - (1000*60*60*24*365*40);