diff --git a/integration-tests/checkstyle-10.12.4-expected-warnings.txt b/integration-tests/checkstyle-10.12.4-expected-warnings.txt
index fceafdb390..283be35a3b 100644
--- a/integration-tests/checkstyle-10.12.4-expected-warnings.txt
+++ b/integration-tests/checkstyle-10.12.4-expected-warnings.txt
@@ -19,14 +19,19 @@ src/it/java/org/checkstyle/suppressionxpathfilter/XpathRegressionNeedBracesTest.
 src/it/java/org/checkstyle/suppressionxpathfilter/XpathRegressionOuterTypeNumberTest.java:[39,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/it/java/org/checkstyle/suppressionxpathfilter/XpathRegressionUnnecessarySemicolonAfterTypeMemberDeclarationTest.java:[41,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/it/java/org/checkstyle/suppressionxpathfilter/XpathRegressionUnnecessarySemicolonInTryWithResourcesTest.java:[41,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
+src/test/java/com/puppycrawl/tools/checkstyle/DetailAstImplTest.java:[597,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
+src/test/java/com/puppycrawl/tools/checkstyle/PackageNamesLoaderTest.java:[58,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/api/FilterSetTest.java:[49,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
 src/test/java/com/puppycrawl/tools/checkstyle/api/FullIdentTest.java:[41,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
+src/test/java/com/puppycrawl/tools/checkstyle/checks/AvoidEscapedUnicodeCharactersCheckTest.java:[77,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
+src/test/java/com/puppycrawl/tools/checkstyle/checks/DescendantTokenCheckTest.java:[39,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
+src/test/java/com/puppycrawl/tools/checkstyle/checks/OrderedPropertiesCheckTest.java:[49,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
+src/test/java/com/puppycrawl/tools/checkstyle/checks/UniquePropertiesCheckTest.java:[65,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/AnnotationLocationCheckTest.java:[193,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `class` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/AnnotationLocationCheckTest.java:[206,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `enum` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/AnnotationLocationCheckTest.java:[217,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `interface` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/AnnotationLocationCheckTest.java:[228,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `package` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/annotation/AnnotationUseStyleCheckTest.java:[103,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
-src/test/java/com/puppycrawl/tools/checkstyle/checks/AvoidEscapedUnicodeCharactersCheckTest.java:[77,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/blocks/EmptyBlockCheckTest.java:[49,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/blocks/EmptyCatchBlockCheckTest.java:[46,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/blocks/LeftCurlyCheckTest.java:[59,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
@@ -61,7 +66,6 @@ src/test/java/com/puppycrawl/tools/checkstyle/checks/coding/UnnecessarySemicolon
 src/test/java/com/puppycrawl/tools/checkstyle/checks/coding/UnnecessarySemicolonAfterTypeMemberDeclarationCheckTest.java:[40,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/coding/UnnecessarySemicolonInEnumerationCheckTest.java:[38,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/coding/UnnecessarySemicolonInTryWithResourcesCheckTest.java:[38,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
-src/test/java/com/puppycrawl/tools/checkstyle/checks/DescendantTokenCheckTest.java:[39,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/design/InterfaceIsTypeCheckTest.java:[37,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/design/MutableExceptionCheckTest.java:[54,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/design/ThrowsCountCheckTest.java:[39,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
@@ -96,7 +100,6 @@ src/test/java/com/puppycrawl/tools/checkstyle/checks/naming/ParameterNameCheckTe
 src/test/java/com/puppycrawl/tools/checkstyle/checks/naming/ParameterNameCheckTest.java:[78,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/naming/PatternVariableNameCheckTest.java:[47,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/naming/TypeNameCheckTest.java:[44,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
-src/test/java/com/puppycrawl/tools/checkstyle/checks/OrderedPropertiesCheckTest.java:[49,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/regexp/RegexpSinglelineCheckTest.java:[120,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/regexp/RegexpSinglelineJavaCheckTest.java:[195,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/sizes/AnonInnerLengthCheckTest.java:[56,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
@@ -106,7 +109,6 @@ src/test/java/com/puppycrawl/tools/checkstyle/checks/sizes/MethodLengthCheckTest
 src/test/java/com/puppycrawl/tools/checkstyle/checks/sizes/OuterTypeNumberCheckTest.java:[73,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/sizes/ParameterNumberCheckTest.java:[58,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/sizes/RecordComponentNumberCheckTest.java:[62,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
-src/test/java/com/puppycrawl/tools/checkstyle/checks/UniquePropertiesCheckTest.java:[65,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/EmptyForInitializerPadCheckTest.java:[50,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/EmptyForIteratorPadCheckTest.java:[49,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/EmptyLineSeparatorCheckTest.java:[51,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
@@ -121,19 +123,17 @@ src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/OperatorWrapChec
 src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/ParenPadCheckTest.java:[44,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/TypecastParenPadCheckTest.java:[41,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/WhitespaceAfterCheckTest.java:[46,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
-src/test/java/com/puppycrawl/tools/checkstyle/DetailAstImplTest.java:[597,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
 src/test/java/com/puppycrawl/tools/checkstyle/filters/IntMatchFilterElementTest.java:[45,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
 src/test/java/com/puppycrawl/tools/checkstyle/filters/SeverityMatchFilterTest.java:[36,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressFilterElementTest.java:[185,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `equals` is already defined in this class or a supertype)
-src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressionCommentFilterTest.java:[142,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
-src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressionSingleFilterTest.java:[42,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressWarningsFilterTest.java:[83,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressWithNearbyCommentFilterTest.java:[210,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
+src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressionCommentFilterTest.java:[142,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
+src/test/java/com/puppycrawl/tools/checkstyle/filters/SuppressionSingleFilterTest.java:[42,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/grammar/antlr4/Antlr4AstRegressionTest.java:[34,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `package` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/grammar/comments/CommentsTest.java:[53,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
 src/test/java/com/puppycrawl/tools/checkstyle/grammar/java8/DefaultMethodsTest.java:[40,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `switch` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/gui/BaseCellEditorTest.java:[31,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `toString` is already defined in this class or a supertype)
-src/test/java/com/puppycrawl/tools/checkstyle/PackageNamesLoaderTest.java:[58,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `default` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/utils/CheckUtilTest.java:[71,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that a method named `equals` is already defined in this class or a supertype)
 src/test/java/com/puppycrawl/tools/checkstyle/xpath/XpathQueryGeneratorTest.java:[205,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `package` is not a valid identifier)
 src/test/java/com/puppycrawl/tools/checkstyle/xpath/XpathQueryGeneratorTest.java:[219,8] [JUnitMethodDeclaration] This method's name should not redundantly start with `test` (but note that `import` is not a valid identifier)
diff --git a/integration-tests/checkstyle-10.12.4.sh b/integration-tests/checkstyle-10.12.4.sh
index 58980370cc..12d107b8f2 100755
--- a/integration-tests/checkstyle-10.12.4.sh
+++ b/integration-tests/checkstyle-10.12.4.sh
@@ -158,7 +158,7 @@ mvn ${shared_build_flags} \
 
 # Perist or validate the warnings reported by Error Prone Support checks.
 baseline_warnings="${integration_test_root}/${test_name}-expected-warnings.txt"
-generated_warnings="$((grep -oP "(?<=^\\Q[WARNING] ${PWD}/\\E).*" "${validation_log_file}" | grep -P '\] \[' || true) | sort)"
+generated_warnings="$((grep -oP "(?<=^\\Q[WARNING] ${PWD}/\\E).*" "${validation_log_file}" | grep -P '\] \[' || true) | LC_ALL=C sort)"
 if [ -n "${do_sync}" ]; then
   echo 'Saving emitted warnings...'
   echo "${generated_warnings}" > "${baseline_warnings}"