diff --git a/src/test/java/de/stklcode/pubtrans/ura/UraClientConfigurationTest.java b/src/test/java/de/stklcode/pubtrans/ura/UraClientConfigurationTest.java
index 6a34ea8..36c0a67 100644
--- a/src/test/java/de/stklcode/pubtrans/ura/UraClientConfigurationTest.java
+++ b/src/test/java/de/stklcode/pubtrans/ura/UraClientConfigurationTest.java
@@ -12,9 +12,9 @@ import static org.junit.jupiter.api.Assertions.assertNull;
  *
  * @author Stefan Kalscheuer
  */
-public class UraClientConfigurationTest {
+class UraClientConfigurationTest {
     @Test
-    public void configBuilderTest() {
+    void configBuilderTest() {
         final String baseURL = "https://ura.example.com";
         final String instantPath = "/path/to/instant";
         final String streamPath = "/path/to/stream";
diff --git a/src/test/java/de/stklcode/pubtrans/ura/UraClientTest.java b/src/test/java/de/stklcode/pubtrans/ura/UraClientTest.java
index 2b823fa..7f5fd3e 100644
--- a/src/test/java/de/stklcode/pubtrans/ura/UraClientTest.java
+++ b/src/test/java/de/stklcode/pubtrans/ura/UraClientTest.java
@@ -45,19 +45,19 @@ import static org.junit.jupiter.api.Assertions.*;
 /**
  * Unit test for the URA Client.
  * Tests run against mocked data collected from ASEAG API (no longer available) and
- * TFL API (http://countdown.api.tfl.gov.uk)
+ * TFL API (<a href="https://countdown.api.tfl.gov.uk">https://countdown.api.tfl.gov.uk</a>)
  *
  * @author Stefan Kalscheuer
  */
-public class UraClientTest {
+class UraClientTest {
 
     @RegisterExtension
-    public static WireMockExtension wireMock = WireMockExtension.newInstance()
+    static WireMockExtension wireMock = WireMockExtension.newInstance()
             .options(wireMockConfig().dynamicPort())
             .build();
 
     @Test
-    public void getStopsTest() throws UraClientException {
+    void getStopsTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(2, "instant_V2_stops.txt");
 
@@ -83,7 +83,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void getStopsForLineTest() throws UraClientException {
+    void getStopsForLineTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(2, "instant_V2_stops_line.txt");
 
@@ -101,7 +101,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void getStopsForPositionTest() throws UraClientException {
+    void getStopsForPositionTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_stops_circle.txt");
 
@@ -127,7 +127,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void getTripsForDestinationNamesTest() throws UraClientException {
+    void getTripsForDestinationNamesTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_trips_destination.txt");
 
@@ -150,7 +150,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void getTripsTowardsTest() throws UraClientException {
+    void getTripsTowardsTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_trips_towards.txt");
 
@@ -165,7 +165,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void getTripsTest() throws UraClientException {
+    void getTripsTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_trips_all.txt");
 
@@ -229,11 +229,11 @@ public class UraClientTest {
                 "Expected reader to raise an exception"
         );
         assertEquals("Failed to read trips from API", exception.getMessage(), "Unexpected error message");
-        assertTrue(exception.getCause() instanceof IOException, "Unexpected error cause");
+        assertInstanceOf(IOException.class, exception.getCause(), "Unexpected error cause");
     }
 
     @Test
-    public void getTripsForStopTest() throws UraClientException {
+    void getTripsForStopTest() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_trips_stop.txt");
 
@@ -274,11 +274,11 @@ public class UraClientTest {
                 "Expected reader to raise an exception"
         );
         assertEquals("Failed to read stops from API", exception.getMessage(), "Unexpected error message");
-        assertTrue(exception.getCause() instanceof IOException, "Unexpected error cause");
+        assertInstanceOf(IOException.class, exception.getCause(), "Unexpected error cause");
     }
 
     @Test
-    public void getTripsForLine() throws UraClientException {
+    void getTripsForLine() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_trips_line.txt");
 
@@ -327,7 +327,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void getTripsForStopAndLine() throws UraClientException {
+    void getTripsForStopAndLine() throws UraClientException {
         // Mock the HTTP call.
         mockHttpToFile(1, "instant_V1_trips_stop_line.txt");
 
@@ -348,7 +348,7 @@ public class UraClientTest {
 
 
     @Test
-    public void getMessages() throws UraClientException {
+    void getMessages() throws UraClientException {
         UraClient uraClient = new UraClient(wireMock.baseUrl());
 
         // Mock the HTTP call.
@@ -379,11 +379,11 @@ public class UraClientTest {
                 "Expected reader to raise an exception"
         );
         assertEquals("Failed to read messages from API", exception.getMessage(), "Unexpected error message");
-        assertTrue(exception.getCause() instanceof IOException, "Unexpected error cause");
+        assertInstanceOf(IOException.class, exception.getCause(), "Unexpected error cause");
     }
 
     @Test
-    public void getMessagesForStop() throws UraClientException {
+    void getMessagesForStop() throws UraClientException {
         UraClient uraClient = new UraClient(wireMock.baseUrl(), "/interfaces/ura/instant_V2", "/interfaces/ura/stream");
 
         // Mock the HTTP call.
@@ -406,7 +406,7 @@ public class UraClientTest {
     }
 
     @Test
-    public void timeoutTest() {
+    void timeoutTest() {
         // Try to read trips from TEST-NET-1 IP that is not routed (hopefully) and will not connect within 100ms.
         UraClientException exception = assertThrows(
                 UraClientException.class,
@@ -417,7 +417,7 @@ public class UraClientTest {
                 ).forDestinationNames("Piccadilly Circus").getTrips(),
                 "Connection to TEST-NET-1 address should fail"
         );
-        assertTrue(exception.getCause() instanceof HttpConnectTimeoutException, "Exception cause is not HttpConnectionTimeoutException");
+        assertInstanceOf(HttpConnectTimeoutException.class, exception.getCause(), "Exception cause is not HttpConnectionTimeoutException");
 
         // Mock the HTTP call with delay of 200ms, but immediate connection.
         wireMock.stubFor(
@@ -444,7 +444,7 @@ public class UraClientTest {
                 ).forDestinationNames("Piccadilly Circus").getTrips(),
                 "Response timeout did not raise an exception"
         );
-        assertTrue(exception.getCause() instanceof HttpTimeoutException, "Exception cause is not HttpTimeoutException");
+        assertInstanceOf(HttpTimeoutException.class, exception.getCause(), "Exception cause is not HttpTimeoutException");
 
         assertDoesNotThrow(
                 () -> new UraClient(
diff --git a/src/test/java/de/stklcode/pubtrans/ura/model/MessageTest.java b/src/test/java/de/stklcode/pubtrans/ura/model/MessageTest.java
index bdd6ff2..2e2e821 100644
--- a/src/test/java/de/stklcode/pubtrans/ura/model/MessageTest.java
+++ b/src/test/java/de/stklcode/pubtrans/ura/model/MessageTest.java
@@ -30,13 +30,13 @@ import static org.hamcrest.core.Is.is;
 import static org.junit.jupiter.api.Assertions.fail;
 
 /**
- * Unit test for the {@link Message} meta model.
+ * Unit test for the {@link Message} model.
  *
  * @author Stefan Kalscheuer
  */
-public class MessageTest {
+class MessageTest {
     @Test
-    public void basicConstructorTest() {
+    void basicConstructorTest() {
         Message message = new Message("sid",
                 "name",
                 "indicator",
@@ -60,7 +60,7 @@ public class MessageTest {
     }
 
     @Test
-    public void listConstructorTest() {
+    void listConstructorTest() {
         /* Create valid raw data list */
         List<Serializable> raw = new ArrayList<>();
         raw.add(1);
diff --git a/src/test/java/de/stklcode/pubtrans/ura/model/StopTest.java b/src/test/java/de/stklcode/pubtrans/ura/model/StopTest.java
index 19d4aed..5562aa0 100644
--- a/src/test/java/de/stklcode/pubtrans/ura/model/StopTest.java
+++ b/src/test/java/de/stklcode/pubtrans/ura/model/StopTest.java
@@ -30,13 +30,13 @@ import static org.hamcrest.core.Is.is;
 import static org.junit.jupiter.api.Assertions.fail;
 
 /**
- * Unit test for the {@link Stop} meta model.
+ * Unit test for the {@link Stop} model.
  *
  * @author Stefan Kalscheuer
  */
-public class StopTest {
+class StopTest {
     @Test
-    public void basicConstructorTest() {
+    void basicConstructorTest() {
         Stop stop = new Stop("id", "name", "indicator", 1, 2.345, 6.789);
         assertThat(stop.getId(), is("id"));
         assertThat(stop.getName(), is("name"));
@@ -47,7 +47,7 @@ public class StopTest {
     }
 
     @Test
-    public void listConstructorTest() {
+    void listConstructorTest() {
         /* Create valid raw data list */
         List<Serializable> raw = new ArrayList<>();
         raw.add(1);
diff --git a/src/test/java/de/stklcode/pubtrans/ura/model/TripTest.java b/src/test/java/de/stklcode/pubtrans/ura/model/TripTest.java
index b042b7a..0fa1613 100644
--- a/src/test/java/de/stklcode/pubtrans/ura/model/TripTest.java
+++ b/src/test/java/de/stklcode/pubtrans/ura/model/TripTest.java
@@ -30,13 +30,13 @@ import static org.hamcrest.core.Is.is;
 import static org.junit.jupiter.api.Assertions.fail;
 
 /**
- * Unit test for the {@link Trip} meta model.
+ * Unit test for the {@link Trip} model.
  *
  * @author Stefan Kalscheuer
  */
-public class TripTest {
+class TripTest {
     @Test
-    public void basicConstructorTest() {
+    void basicConstructorTest() {
         Trip trip = new Trip("sid",
                 "name",
                 "indicator",
@@ -70,7 +70,7 @@ public class TripTest {
     }
 
     @Test
-    public void listConstructorTest() {
+    void listConstructorTest() {
         /* Create valid raw data list */
         List<Serializable> raw = new ArrayList<>();
         raw.add(1);
diff --git a/src/test/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReaderTest.java b/src/test/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReaderTest.java
index 53fbf13..c78e61a 100644
--- a/src/test/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReaderTest.java
+++ b/src/test/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReaderTest.java
@@ -18,13 +18,12 @@ package de.stklcode.pubtrans.ura.reader;
 
 import com.github.tomakehurst.wiremock.WireMockServer;
 import com.github.tomakehurst.wiremock.client.WireMock;
-import com.github.tomakehurst.wiremock.common.FileSource;
 import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
 import com.github.tomakehurst.wiremock.extension.Parameters;
-import com.github.tomakehurst.wiremock.extension.ResponseTransformer;
+import com.github.tomakehurst.wiremock.extension.ResponseTransformerV2;
 import com.github.tomakehurst.wiremock.http.ChunkedDribbleDelay;
-import com.github.tomakehurst.wiremock.http.Request;
 import com.github.tomakehurst.wiremock.http.Response;
+import com.github.tomakehurst.wiremock.stubbing.ServeEvent;
 import de.stklcode.pubtrans.ura.UraClientConfiguration;
 import de.stklcode.pubtrans.ura.model.Trip;
 import org.junit.jupiter.api.AfterAll;
@@ -54,7 +53,7 @@ import static org.junit.jupiter.api.Assumptions.assumeTrue;
  *
  * @author Stefan Kalscheuer
  */
-public class AsyncUraTripReaderTest {
+class AsyncUraTripReaderTest {
     private static WireMockServer httpMock;
 
     @BeforeAll
@@ -82,7 +81,7 @@ public class AsyncUraTripReaderTest {
      * @throws InterruptedException Thread interrupted.
      */
     @Test
-    public void readerTest() throws InterruptedException {
+    void readerTest() throws InterruptedException {
         // Callback counter for some unhandy async mockery.
         final AtomicInteger counter = new AtomicInteger(0);
 
@@ -161,7 +160,7 @@ public class AsyncUraTripReaderTest {
      * @throws InterruptedException Thread interrupted.
      */
     @Test
-    public void streamClosedTest() throws InterruptedException {
+    void streamClosedTest() throws InterruptedException {
         // Callback counter for some unhandy async mockery.
         final AtomicInteger counter = new AtomicInteger(0);
 
@@ -202,7 +201,7 @@ public class AsyncUraTripReaderTest {
     }
 
     @Test
-    public void timeoutTest() throws InterruptedException {
+    void timeoutTest() throws InterruptedException {
         // Callback counter for some unhandy async mockery.
         final AtomicInteger counter = new AtomicInteger(0);
 
@@ -289,9 +288,10 @@ public class AsyncUraTripReaderTest {
         );
     }
 
-    public static class StreamTransformer extends ResponseTransformer {
+    public static class StreamTransformer implements ResponseTransformerV2 {
         @Override
-        public Response transform(Request request, Response response, FileSource files, Parameters parameters) {
+        public Response transform(Response response, ServeEvent serveEvent) {
+            Parameters parameters = serveEvent.getTransformerParameters();
             int chunks = parameters.getInt("chunks", 1);
             return Response.Builder.like(response)
                     // Read source file to response.