diff --git a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidator.java b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidator.java
index 56b9fab..f6a73a6 100644
--- a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidator.java
+++ b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidator.java
@@ -16,4 +16,9 @@ public class ConfigPathValidator extends PathValidator {
     protected BiFunction<YAML, ConfigProperty, Optional<File>> provideDataYaml() {
         return (yaml, property) -> Optional.empty();
     }
+
+    @Override
+    protected boolean isValid(File result) {
+        return super.isValid(result) && (result.getAbsolutePath().endsWith(".yml") || result.getAbsolutePath().endsWith(".yaml"));
+    }
 }
diff --git a/src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidatorTest.java b/src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidatorTest.java
new file mode 100644
index 0000000..677b519
--- /dev/null
+++ b/src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validator/ConfigPathValidatorTest.java
@@ -0,0 +1,63 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validator;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.ValidationResult;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.ConfigProperty;
+import at.pcgamingfreaks.yaml.YAML;
+import at.pcgamingfreaks.yaml.YamlInvalidContentException;
+import org.apache.commons.cli.CommandLineParser;
+import org.apache.commons.cli.DefaultParser;
+import org.apache.commons.cli.Options;
+import org.apache.commons.cli.ParseException;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.util.stream.Stream;
+
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.config.ValidationResult.*;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.config.ValidationResult.INVALID;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.model.ConfigProperty.CONFIG_PATH;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.model.ConfigProperty.LIBRARY;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.CommandLineOptionsUtil.optionOf;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.TestUtil.argumentsOf;
+import static org.junit.jupiter.api.Assertions.*;
+
+class ConfigPathValidatorTest {
+    private static final String TEST_DIR = "src/test/resources/test-dir";
+    private static final String TEST_FILE = "src/test/resources/test-dir/test-file.mkv";
+    private static final String TEST_CONFIG = "src/test/resources/test-dir/test-config.yml";
+
+    private static CommandLineParser parser;
+    private static Options options;
+
+    @BeforeAll
+    static void before() {
+        parser = new DefaultParser();
+        options = new Options();
+        options.addOption(optionOf(CONFIG_PATH, CONFIG_PATH.abrv(), true));
+    }
+
+    private static Stream<Arguments> provideTestCases() {
+        return Stream.of(
+                argumentsOf(CONFIG_PATH, true, null, "", new String[]{"-c", TEST_CONFIG}, VALID),
+                argumentsOf(CONFIG_PATH, true, null, "config-path: " + TEST_CONFIG, new String[]{}, MISSING),
+                argumentsOf(CONFIG_PATH, false, null, "config-path: " + TEST_CONFIG, new String[]{}, NOT_PRESENT),
+                argumentsOf(CONFIG_PATH, false, Path.of(TEST_CONFIG).toFile(), "", new String[]{}, DEFAULT),
+                argumentsOf(CONFIG_PATH, true, null, "", new String[]{"-c", TEST_FILE}, INVALID)
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("provideTestCases")
+    void validate(ConfigProperty property, boolean required, File defaultValue, String yamlArgs, String[] cmdArgs,
+                  ValidationResult expectedResult) throws ParseException, YamlInvalidContentException {
+        ConfigPathValidator underTest = new ConfigPathValidator(property, required, defaultValue);
+
+        ValidationResult result = underTest.validate(new YAML(yamlArgs), parser.parse(options, cmdArgs));
+
+        assertEquals(expectedResult, result);
+    }
+}
\ No newline at end of file
diff --git a/src/test/resources/test-dir/test-config.yml b/src/test/resources/test-dir/test-config.yml
new file mode 100644
index 0000000..e69de29