diff --git a/config/checkstyle.properties b/config/checkstyle.properties
index d0a76583..b71118aa 100644
--- a/config/checkstyle.properties
+++ b/config/checkstyle.properties
@@ -1,6 +1,6 @@
 checkstyle.suppressions.file=config/suppressions.xml
 checkstyle.suppressions-xpath.file=config/suppressions.xml
 checkstyle.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java.header
-checkstyle.regexp.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java_regexp.header
+checkstyle.regexp.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java-regexp.header
 checkstyle.importcontrol.file=config/import-control.xml
 checkstyle.importcontroltest.file=config/import-control-test.xml
diff --git a/src/test/java/com/puppycrawl/tools/checkstyle/filters/AbstractPatchFilterEvaluationTest.java b/src/test/java/com/puppycrawl/tools/checkstyle/filters/AbstractPatchFilterEvaluationTest.java
index c3dbf450..9685488b 100644
--- a/src/test/java/com/puppycrawl/tools/checkstyle/filters/AbstractPatchFilterEvaluationTest.java
+++ b/src/test/java/com/puppycrawl/tools/checkstyle/filters/AbstractPatchFilterEvaluationTest.java
@@ -1,6 +1,6 @@
 ///////////////////////////////////////////////////////////////////////////////////////////////
 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
-// Copyright (C) 2001-2022 the original author or authors.
+// Copyright (C) 2001-2024 the original author or authors.
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Lesser General Public
@@ -34,6 +34,7 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.stream.Collectors;
 
 import com.puppycrawl.tools.checkstyle.AbstractModuleTestSupport;
@@ -51,6 +52,8 @@ abstract class AbstractPatchFilterEvaluationTest extends AbstractModuleTestSuppo
 
     protected void testByConfig(String configPath)
             throws Exception {
+        Locale.setDefault(Locale.ENGLISH);
+        
         final String inputFile = configPath.replaceFirst(
                 "(default|zero)ContextConfig.xml", "");
         // we can add here any variable to provide path to patch name by PropertiesExpander