diff --git a/build.gradle b/build.gradle
index db1ec197829cd685633da87968e67ba8c15aafaa..b8a252d168b4b3013ef9eed96247968d407b5a53 100644
--- a/build.gradle
+++ b/build.gradle
@@ -34,6 +34,7 @@ dependencies {
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: "${junit_jupiter_version}"
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-params', version: "${junit_jupiter_version}"
     testImplementation group: 'com.jayway.jsonpath', name: 'json-path', version: "${json_path_version}"
+    testImplementation group: 'commons-validator', name: 'commons-validator', version: "${commons_validator_version}"
 }
 
 buildscript {
diff --git a/gradle.properties b/gradle.properties
index bd099a2909758dbb009fee0daf90170d78eb03b0..13b7e68714d8de7b279648b08afd5ad51024eb2f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,4 +3,5 @@ swagger_parser_version = 2.0.30
 junit_jupiter_version = 5.7.0
 json_path_version = 2.6.0
 jastaddgradle_version = 1.13.3
-grammar2uml_version = 0.2.2-13
\ No newline at end of file
+grammar2uml_version = 0.2.2-13
+commons_validator_version = 1.7
\ No newline at end of file
diff --git a/src/main/java/de/tudresden/inf/st/openapi/OpenAPIMain.java b/src/main/java/de/tudresden/inf/st/openapi/OpenAPIMain.java
index c5960626435bf0a8ea61f788d1a28d7904798ae6..d7107bdb6c91ff374cbb929165f7ffcaf480d552 100644
--- a/src/main/java/de/tudresden/inf/st/openapi/OpenAPIMain.java
+++ b/src/main/java/de/tudresden/inf/st/openapi/OpenAPIMain.java
@@ -20,6 +20,7 @@ import org.apache.http.impl.client.HttpClientBuilder;
 
 import javax.net.ssl.HttpsURLConnection;
 import java.io.*;
+import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -123,6 +124,8 @@ public class OpenAPIMain {
                 }
             }
         } catch (Exception e) {
+            if (e instanceof MalformedURLException)
+                System.out.println("MalformedURLException");
             //System.out.println(e.toString());
         }
         return dict;
@@ -161,6 +164,8 @@ public class OpenAPIMain {
                 }
             }
         } catch (Exception e) {
+            if (e instanceof MalformedURLException)
+                System.out.println("MalformedURLException");
             //System.out.println(e.toString());
         }
         return dict;
diff --git a/src/test/java/openapi/OpenAPIMain_test.java b/src/test/java/openapi/OpenAPIMain_test.java
index e1ba8d186c84769f419fe8c173308357d163ecba..4041f3854de4aa284359a947d19a681fe2baad6c 100644
--- a/src/test/java/openapi/OpenAPIMain_test.java
+++ b/src/test/java/openapi/OpenAPIMain_test.java
@@ -12,6 +12,7 @@ import io.swagger.v3.core.util.Yaml;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.parser.OpenAPIV3Parser;
 import io.swagger.v3.parser.core.models.SwaggerParseResult;
+import org.apache.commons.validator.routines.UrlValidator;
 import org.junit.jupiter.api.*;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
@@ -64,6 +65,25 @@ public class OpenAPIMain_test {
     compareJson(expectedNode, actualNode, Paths.get(file.getPath()));
   }
 
+  @MethodSource("resources")
+  @ParameterizedTest
+  void RandomUrlTest(File file) throws Exception {
+    OpenAPIObject jastAddObject;
+    OpenAPI POJOOpenAPI;
+    List<String> urls;
+    UrlValidator urlValidator = new UrlValidator();
+
+    SwaggerParseResult result = new OpenAPIParser().readLocation(file.getPath(), null, null);
+    POJOOpenAPI = result.getOpenAPI();
+    System.out.println("Loading expression DSL file '" + file + "'.");
+
+    jastAddObject = OpenAPIObject.parseOpenAPI(POJOOpenAPI);
+    urls = jastAddObject.generateRequests();
+
+    for ( String url : urls )
+      Assertions.assertFalse( urlValidator.isValid(url), "validation of the generated Urls not succeeded" );
+  }
+
   static Stream<File> resources() {
     return resources.stream();
   }