diff --git a/backend/src/main/java/de/grimsi/gameyfin/igdb/IgdbWrapper.java b/backend/src/main/java/de/grimsi/gameyfin/igdb/IgdbWrapper.java
index 7903073..9b30bc5 100644
--- a/backend/src/main/java/de/grimsi/gameyfin/igdb/IgdbWrapper.java
+++ b/backend/src/main/java/de/grimsi/gameyfin/igdb/IgdbWrapper.java
@@ -60,7 +60,7 @@ public class IgdbWrapper {
         initIgdbClient();
     }
 
-    public void authenticate() {
+    private void authenticate() {
         log.info("Authenticating on Twitch API...");
 
         URI url = UriComponentsBuilder
diff --git a/backend/src/main/java/de/grimsi/gameyfin/igdb/dto/TwitchOAuthTokenDto.java b/backend/src/main/java/de/grimsi/gameyfin/igdb/dto/TwitchOAuthTokenDto.java
index b971883..64fb1fa 100644
--- a/backend/src/main/java/de/grimsi/gameyfin/igdb/dto/TwitchOAuthTokenDto.java
+++ b/backend/src/main/java/de/grimsi/gameyfin/igdb/dto/TwitchOAuthTokenDto.java
@@ -2,6 +2,8 @@ package de.grimsi.gameyfin.igdb.dto;
 
 import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
diff --git a/backend/src/test/java/de/grimsi/gameyfin/igdb/IgdbWrapperTest.java b/backend/src/test/java/de/grimsi/gameyfin/igdb/IgdbWrapperTest.java
index 3c00e2f..7942f25 100644
--- a/backend/src/test/java/de/grimsi/gameyfin/igdb/IgdbWrapperTest.java
+++ b/backend/src/test/java/de/grimsi/gameyfin/igdb/IgdbWrapperTest.java
@@ -1,35 +1,65 @@
 package de.grimsi.gameyfin.igdb;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.protobuf.Message;
+import com.igdb.proto.Igdb;
+import de.grimsi.gameyfin.config.WebClientConfig;
+import de.grimsi.gameyfin.igdb.dto.TwitchOAuthTokenDto;
+import de.grimsi.gameyfin.mapper.GameMapper;
+import io.github.resilience4j.bulkhead.Bulkhead;
+import io.github.resilience4j.bulkhead.BulkheadConfig;
+import io.github.resilience4j.ratelimiter.RateLimiter;
+import io.github.resilience4j.ratelimiter.RateLimiterConfig;
+import okhttp3.mockwebserver.MockResponse;
 import okhttp3.mockwebserver.MockWebServer;
+import okhttp3.mockwebserver.RecordedRequest;
+import okio.Buffer;
+import org.jeasy.random.EasyRandom;
+import org.jeasy.random.EasyRandomParameters;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Order;
 import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.DynamicPropertyRegistry;
-import org.springframework.test.context.DynamicPropertySource;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.springframework.web.reactive.function.client.WebClient;
 
 import java.io.IOException;
+import java.util.Optional;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
-@SpringBootTest
+@ExtendWith(MockitoExtension.class)
 class IgdbWrapperTest {
 
     private static final MockWebServer igdbApiMock = new MockWebServer();
     private static final MockWebServer twitchApiMock = new MockWebServer();
+    private static final EasyRandom easyRandom = new EasyRandom();
+    private static final ObjectMapper objectMapper = new ObjectMapper();
 
-    private IgdbWrapper target;
-
-    @DynamicPropertySource
-    static void setupProperties(DynamicPropertyRegistry registry) {
-        registry.add("gameyfin.igdb.api.endpoints.base", () -> "http://localhost:%s".formatted(igdbApiMock.getPort()));
-        registry.add("gameyfin.igdb.api.endpoints.auth", () -> "http://localhost:%s".formatted(twitchApiMock.getPort()));
-    }
+    private static IgdbWrapper target;
 
     @BeforeAll
     static void setup() throws IOException {
+        WebClientConfig webClientConfigMock = mock(WebClientConfig.class);
+        GameMapper gameMapperMock = mock(GameMapper.class);
+
+        target = new IgdbWrapper(WebClient.builder(), webClientConfigMock, gameMapperMock);
+
         igdbApiMock.start();
         twitchApiMock.start();
+
+        ReflectionTestUtils.setField(target, "clientId", "client_id_value");
+        ReflectionTestUtils.setField(target, "clientSecret", "client_secret_value");
+        ReflectionTestUtils.setField(target, "igdbApiBaseUrl", "http://localhost:%s".formatted(igdbApiMock.getPort()));
+        ReflectionTestUtils.setField(target, "twitchAuthUrl", "http://localhost:%s/oauth2/token".formatted(twitchApiMock.getPort()));
+
+        when(webClientConfigMock.getIgdbConcurrencyLimiter()).thenReturn(Bulkhead.of("test_bulkhead", BulkheadConfig.ofDefaults()));
+        when(webClientConfigMock.getIgdbRateLimiter()).thenReturn(RateLimiter.of("test_ratelimiter", RateLimiterConfig.ofDefaults()));
     }
 
     @AfterAll
@@ -39,11 +69,53 @@ class IgdbWrapperTest {
     }
 
     @Test
-    void authenticate() {
+    @Order(0)
+    void init() throws JsonProcessingException, InterruptedException {
+        TwitchOAuthTokenDto mockToken = easyRandom.nextObject(TwitchOAuthTokenDto.class);
+
+        twitchApiMock.enqueue(new MockResponse()
+                .setBody(objectMapper.writeValueAsString(mockToken))
+                .addHeader("Content-Type", "application/json"));
+
+        target.init();
+
+        RecordedRequest r = twitchApiMock.takeRequest();
+        assertThat(r.getRequestUrl()).isNotNull();
+        assertThat(r.getRequestUrl().encodedPath()).isEqualTo("/oauth2/token");
+        assertThat(r.getRequestUrl().queryParameter("client_id")).isEqualTo("client_id_value");
+        assertThat(r.getRequestUrl().queryParameter("client_secret")).isEqualTo("client_secret_value");
+        assertThat(r.getRequestUrl().queryParameter("grant_type")).isEqualTo("client_credentials");
     }
 
     @Test
-    void getGameById() {
+    void getGameById() throws InterruptedException {
+        //Igdb.GameResult gameResult = easyRandom.nextObject(Igdb.GameResult.class);
+        Igdb.GameResult gameResult = Igdb.GameResult.newBuilder()
+                .addGames(Igdb.Game.newBuilder().setId(easyRandom.nextLong()))
+                .build();
+
+        Long gameId = gameResult.getGames(0).getId();
+
+        igdbApiMock.enqueue(new MockResponse()
+                .setBody(toBuffer(gameResult))
+                .setHeader("Content-Type", "application/protobuf")
+        );
+
+        Optional<Igdb.Game> gameOptional = target.getGameById(gameId);
+
+        assertThat(gameOptional).isPresent();
+
+        Igdb.Game game = gameOptional.get();
+
+        assertThat(game.getId()).isEqualTo(gameId);
+
+        RecordedRequest r = igdbApiMock.takeRequest();
+        assertThat(r.getRequestUrl()).isNotNull();
+        assertThat(r.getRequestUrl().encodedPath()).isEqualTo("/%s".formatted(IgdbApiProperties.ENPOINT_GAMES_PROTOBUF));
+
+        String expectedQuery = "fields %s; where id = %d; limit 1;".formatted(IgdbApiProperties.GAME_QUERY_FIELDS_STRING, gameId);
+
+        assertThat(r.getBody().readUtf8()).isEqualTo(expectedQuery);
     }
 
     @Test
@@ -57,4 +129,10 @@ class IgdbWrapperTest {
     @Test
     void searchForGameByTitle() {
     }
+
+    private static Buffer toBuffer(Message input) {
+        Buffer b = new Buffer();
+        b.write(input.toByteArray());
+        return b;
+    }
 }