diff --git a/.ci/pitest-suppressions/pitest-whitespace-suppressions.xml b/.ci/pitest-suppressions/pitest-whitespace-suppressions.xml
index 34f25dbb6f4..8c241d861ca 100644
--- a/.ci/pitest-suppressions/pitest-whitespace-suppressions.xml
+++ b/.ci/pitest-suppressions/pitest-whitespace-suppressions.xml
@@ -1,14 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <suppressedMutations>
-  <mutation unstable="false">
-    <sourceFile>AbstractParenPadCheck.java</sourceFile>
-    <mutatedClass>com.puppycrawl.tools.checkstyle.checks.whitespace.AbstractParenPadCheck</mutatedClass>
-    <mutatedMethod>setOption</mutatedMethod>
-    <mutator>org.pitest.mutationtest.engine.gregor.mutators.experimental.NakedReceiverMutator</mutator>
-    <description>replaced call to java/lang/String::toUpperCase with receiver</description>
-    <lineContent>option = PadOption.valueOf(optionStr.trim().toUpperCase(Locale.ENGLISH));</lineContent>
-  </mutation>
-
   <mutation unstable="false">
     <sourceFile>EmptyForInitializerPadCheck.java</sourceFile>
     <mutatedClass>com.puppycrawl.tools.checkstyle.checks.whitespace.EmptyForInitializerPadCheck</mutatedClass>
diff --git a/src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/ParenPadCheckTest.java b/src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/ParenPadCheckTest.java
index 3b2ea7b002e..4318ca3a7c4 100644
--- a/src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/ParenPadCheckTest.java
+++ b/src/test/java/com/puppycrawl/tools/checkstyle/checks/whitespace/ParenPadCheckTest.java
@@ -150,8 +150,7 @@ public void test1322879() throws Exception {
     public void testTrimOptionProperty() throws Exception {
         final String[] expected = CommonUtil.EMPTY_STRING_ARRAY;
         verifyWithInlineConfigParser(
-                getPath("InputParenPadToCheckTrimFunctionInOptionProperty.java"),
-               expected);
+                getPath("InputParenPadToCheckTrimFunctionInOptionProperty.java"), expected);
     }
 
     @Test
diff --git a/src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/parenpad/InputParenPadWithSpace.java b/src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/parenpad/InputParenPadWithSpace.java
index 68669091bee..feb35cc903b 100644
--- a/src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/parenpad/InputParenPadWithSpace.java
+++ b/src/test/resources/com/puppycrawl/tools/checkstyle/checks/whitespace/parenpad/InputParenPadWithSpace.java
@@ -1,6 +1,6 @@
 /*
 ParenPad
-option = SPACE
+option = space
 tokens = (default)ANNOTATION, ANNOTATION_FIELD_DEF, CTOR_CALL, CTOR_DEF, DOT, \
          ENUM_CONSTANT_DEF, EXPR, LITERAL_CATCH, LITERAL_DO, LITERAL_FOR, LITERAL_IF, \
          LITERAL_NEW, LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_WHILE, METHOD_CALL, \