diff --git a/backend/src/main/java/de/szut/casino/coinflip/CoinflipDto.java b/backend/src/main/java/de/szut/casino/coinflip/CoinflipDto.java
index a7f9adb..8d5a47b 100644
--- a/backend/src/main/java/de/szut/casino/coinflip/CoinflipDto.java
+++ b/backend/src/main/java/de/szut/casino/coinflip/CoinflipDto.java
@@ -2,16 +2,13 @@ package de.szut.casino.coinflip;
 
 import de.szut.casino.shared.dto.BetDto;
 import jakarta.validation.constraints.NotNull;
-import lombok.AllArgsConstructor;
 import lombok.Getter;
-import lombok.NoArgsConstructor;
 import lombok.Setter;
 
 import java.math.BigDecimal;
 
 @Getter
 @Setter
-@NoArgsConstructor
 public class CoinflipDto extends BetDto {
     @NotNull(message = "chosen side cannot be null")
     private CoinSide coinSide;
diff --git a/backend/src/main/java/de/szut/casino/coinflip/CoinflipService.java b/backend/src/main/java/de/szut/casino/coinflip/CoinflipService.java
index c6c39d7..c706ffa 100644
--- a/backend/src/main/java/de/szut/casino/coinflip/CoinflipService.java
+++ b/backend/src/main/java/de/szut/casino/coinflip/CoinflipService.java
@@ -9,12 +9,11 @@ import java.util.Random;
 
 @Service
 public class CoinflipService {
-    private final Random random;
+    private final Random random = new Random();
     private final BalanceService balanceService;
 
-    public CoinflipService(BalanceService balanceService, Random random) {
+    public CoinflipService(BalanceService balanceService) {
         this.balanceService = balanceService;
-        this.random = random;
     }
 
     public CoinflipResult play(UserEntity user, CoinflipDto coinflipDto) {
diff --git a/backend/src/main/java/de/szut/casino/config/AppConfig.java b/backend/src/main/java/de/szut/casino/config/AppConfig.java
deleted file mode 100644
index 9d9c869..0000000
--- a/backend/src/main/java/de/szut/casino/config/AppConfig.java
+++ /dev/null
@@ -1,15 +0,0 @@
-package de.szut.casino.config;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-import java.util.Random;
-
-@Configuration
-public class AppConfig {
-
-    @Bean
-    public Random random() {
-        return new Random();
-    }
-}
diff --git a/backend/src/test/java/de/szut/casino/coinflip/CoinflipServiceTest.java b/backend/src/test/java/de/szut/casino/coinflip/CoinflipServiceTest.java
deleted file mode 100644
index 2b15ba0..0000000
--- a/backend/src/test/java/de/szut/casino/coinflip/CoinflipServiceTest.java
+++ /dev/null
@@ -1,64 +0,0 @@
-package de.szut.casino.coinflip;
-
-import de.szut.casino.shared.service.BalanceService;
-import de.szut.casino.user.UserEntity;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-import org.mockito.InjectMocks;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-
-import java.math.BigDecimal;
-import java.util.Random;
-
-import static org.junit.jupiter.api.Assertions.*;
-import static org.mockito.Mockito.*;
-
-class CoinflipServiceTest {
-
-    @Mock
-    private BalanceService balanceService;
-
-    @Mock
-    private Random random;
-
-    @InjectMocks
-    private CoinflipService coinflipService;
-
-    private UserEntity user;
-    private CoinflipDto coinflipDto;
-
-    @BeforeEach
-    void setUp() {
-        MockitoAnnotations.openMocks(this);
-        user = new UserEntity();
-        user.setBalance(BigDecimal.valueOf(100));
-        coinflipDto = new CoinflipDto(BigDecimal.valueOf(10), CoinSide.HEAD);
-    }
-
-    @Test
-    void testPlay_userWins() {
-        when(random.nextBoolean()).thenReturn(true);
-
-        CoinflipResult result = coinflipService.play(user, coinflipDto);
-
-        assertTrue(result.isWin());
-        assertEquals(BigDecimal.valueOf(20), result.getPayout());
-        assertEquals(CoinSide.HEAD, result.getCoinSide());
-        verify(balanceService, times(1)).subtractFunds(user, BigDecimal.valueOf(10));
-        verify(balanceService, times(1)).addFunds(user, BigDecimal.valueOf(20));
-    }
-
-    @Test
-    void testPlay_userLoses() {
-        when(random.nextBoolean()).thenReturn(false);
-
-        CoinflipResult result = coinflipService.play(user, coinflipDto);
-
-        assertFalse(result.isWin());
-        assertEquals(BigDecimal.ZERO, result.getPayout());
-        assertEquals(CoinSide.TAILS, result.getCoinSide());
-        verify(balanceService, times(1)).subtractFunds(user, BigDecimal.valueOf(10));
-        verify(balanceService, never()).addFunds(any(), any());
-    }
-}