diff --git a/core-java-modules/core-java-string-operations-3/src/main/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUtils.java b/core-java-modules/core-java-string-operations-3/src/main/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUtils.java
index c1af75eca1..f79d01e0c2 100644
--- a/core-java-modules/core-java-string-operations-3/src/main/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUtils.java
+++ b/core-java-modules/core-java-string-operations-3/src/main/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUtils.java
@@ -7,7 +7,7 @@ import java.util.Arrays;
 
 public class StringFilenameValidationUtils {
 
-    public static final Character[] INVALID_WINDOWS_SPECIFIC_CHARS = {'"', '*', ':', '<', '>', '?', '\\', '|', '/'};
+    public static final Character[] INVALID_WINDOWS_SPECIFIC_CHARS = {'"', '*', ':', '<', '>', '?', '\\', '|'};
     public static final Character[] INVALID_UNIX_SPECIFIC_CHARS = {'\000'};
 
     public static final String REGEX_PATTERN = "^[A-za-z0-9.]{1,255}$";
diff --git a/core-java-modules/core-java-string-operations-3/src/test/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUnitTest.java b/core-java-modules/core-java-string-operations-3/src/test/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUnitTest.java
index b86aba3873..04f6b83183 100644
--- a/core-java-modules/core-java-string-operations-3/src/test/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUnitTest.java
+++ b/core-java-modules/core-java-string-operations-3/src/test/java/com/baeldung/stringfilenamevalidaiton/StringFilenameValidationUnitTest.java
@@ -70,7 +70,7 @@ public class StringFilenameValidationUnitTest {
 
     @ParameterizedTest
     @EnabledOnOs({OS.LINUX, OS.MAC})
-    @MethodSource("filenamesWithInvalidUnixChars")
+    @MethodSource("filenamesWithInvalidWindowsChars")
     public void givenFilenameStringWithInvalidWindowsCharAndIsUnix_whenValidateUsingIO_thenReturnTrue(String filename) throws IOException {
         assertThat(validateStringFilenameUsingIO(filename)).isTrue();
         assertThat(validateStringFilenameUsingNIO2(filename)).isTrue();