diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 9f354e4..7a11e9b 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -7,7 +7,7 @@ on:
     branches: [ "master" ]
 
 permissions:
-  contents: read
+  contents: write
   pull-requests: write
 
 jobs:
@@ -15,25 +15,41 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
-
-    - name: Set up JDK 21
-      uses: actions/setup-java@v4
-      with:
-        java-version: '21'
-        distribution: 'temurin'
-        cache: maven
-
-    - name: Build and Test with Maven
-      run: mvn -B test
-
-    - name: Add JaCoCo PR Comment
-      uses: madrapps/jacoco-report@v1.6.1
-      if: github.event_name == 'pull_request'
-      with:
-        paths: ${{ github.workspace }}/target/site/jacoco/jacoco.xml
-        token: ${{ secrets.GITHUB_TOKEN }}
-        min-coverage-overall: 80
-        min-coverage-changed-files: 80
-        title: 'Code Coverage Report'
-        update-comment: true
\ No newline at end of file
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          java-version: '25'
+          distribution: 'temurin'
+          cache: maven
+
+      - name: Build and Test with Maven
+        run: mvn -B test
+
+      - name: Add JaCoCo PR Comment
+        uses: madrapps/jacoco-report@v1.6.1
+        if: github.event_name == 'pull_request'
+        with:
+          paths: ${{ github.workspace }}/target/site/jacoco/jacoco.xml
+          token: ${{ secrets.GITHUB_TOKEN }}
+          min-coverage-overall: 80
+          min-coverage-changed-files: 80
+          title: 'Code Coverage Report'
+          update-comment: true
+
+      - name: Generate JaCoCo Badge
+        uses: cicirello/jacoco-badge-generator@v2
+        if: github.ref == 'refs/heads/master'
+        with:
+          badges-directory: .github/badges
+          generate-branches-badge: true
+
+      - name: Commit and push badge
+        if: github.ref == 'refs/heads/master'
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git add .github/badges
+          git diff --staged --quiet || git commit -m "chore: update coverage badge [skip ci]"
+          git push
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 6c702be..b0c1566 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,8 +9,7 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <maven.compiler.source>21</maven.compiler.source>
-        <maven.compiler.target>21</maven.compiler.target>
+        <maven.compiler.release>25</maven.compiler.release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
@@ -44,16 +43,21 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.13.0</version>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>3.2.5</version>
+                <version>3.5.0</version>
             </plugin>
 
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.11</version>
+                <version>0.8.13</version>
                 <executions>
                     <execution>
                         <goals>
@@ -67,6 +71,27 @@
                             <goal>report</goal>
                         </goals>
                     </execution>
+                    <execution>
+                        <id>check</id>
+                        <phase>test</phase>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                        <configuration>
+                            <rules>
+                                <rule>
+                                    <element>BUNDLE</element>
+                                    <limits>
+                                        <limit>
+                                            <counter>LINE</counter>
+                                            <value>COVEREDRATIO</value>
+                                            <minimum>0.50</minimum>
+                                        </limit>
+                                    </limits>
+                                </rule>
+                            </rules>
+                        </configuration>
+                    </execution>
                 </executions>
             </plugin>
         </plugins>
diff --git a/src/test/java/de/asedem/service/CopyServiceTest.java b/src/test/java/de/asedem/service/CopyServiceTest.java
new file mode 100644
index 0000000..a7c5c92
--- /dev/null
+++ b/src/test/java/de/asedem/service/CopyServiceTest.java
@@ -0,0 +1,59 @@
+package de.asedem.service;
+
+import de.asedem.Ollama;
+import de.asedem.exception.OllamaConnectionException;
+import de.asedem.rest.HttpMethode;
+import de.asedem.rest.Rest;
+import de.asedem.rest.RestResponse;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class CopyServiceTest {
+
+    @Test
+    void testMethodCall() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/copy"),
+                            HttpMethode.POST, new CopyService.CopyRequest("llama2:latest", "llama2:copy")))
+                    .thenReturn(new RestResponse(200, ""));
+
+            assertTrue(ollama.copy("llama2:latest", "llama2:copy"));
+        }
+    }
+
+    @Test
+    void testFalseIfNotSuccessful() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/copy"),
+                            HttpMethode.POST, new CopyService.CopyRequest("llama2:latest", "llama2:copy")))
+                    .thenReturn(new RestResponse(404, ""));
+
+            assertFalse(ollama.copy("llama2:latest", "llama2:copy"));
+        }
+    }
+
+    @Test
+    void testException() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/copy"),
+                            HttpMethode.POST, new CopyService.CopyRequest("llama2:latest", "llama2:copy")))
+                    .thenThrow(new IOException());
+
+            assertThrows(OllamaConnectionException.class, () -> ollama.copy("llama2:latest", "llama2:copy"));
+        }
+    }
+}
diff --git a/src/test/java/de/asedem/service/DeleteServiceTest.java b/src/test/java/de/asedem/service/DeleteServiceTest.java
new file mode 100644
index 0000000..3d6399a
--- /dev/null
+++ b/src/test/java/de/asedem/service/DeleteServiceTest.java
@@ -0,0 +1,59 @@
+package de.asedem.service;
+
+import de.asedem.Ollama;
+import de.asedem.exception.OllamaConnectionException;
+import de.asedem.rest.HttpMethode;
+import de.asedem.rest.Rest;
+import de.asedem.rest.RestResponse;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class DeleteServiceTest {
+
+    @Test
+    void testMethodCall() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/delete"),
+                            HttpMethode.POST, new DeleteService.DeleteRequest("llama2:latest")))
+                    .thenReturn(new RestResponse(200, ""));
+
+            assertTrue(ollama.delete("llama2:latest"));
+        }
+    }
+
+    @Test
+    void testFalseIfNotSuccessful() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/delete"),
+                            HttpMethode.POST, new DeleteService.DeleteRequest("llama2:latest")))
+                    .thenReturn(new RestResponse(404, ""));
+
+            assertFalse(ollama.delete("llama2:latest"));
+        }
+    }
+
+    @Test
+    void testException() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/delete"),
+                            HttpMethode.POST, new DeleteService.DeleteRequest("llama2:latest")))
+                    .thenThrow(new IOException());
+
+            assertThrows(OllamaConnectionException.class, () -> ollama.delete("llama2:latest"));
+        }
+    }
+}
diff --git a/src/test/java/de/asedem/service/ShowInfoServiceTest.java b/src/test/java/de/asedem/service/ShowInfoServiceTest.java
new file mode 100644
index 0000000..498942d
--- /dev/null
+++ b/src/test/java/de/asedem/service/ShowInfoServiceTest.java
@@ -0,0 +1,56 @@
+package de.asedem.service;
+
+import de.asedem.Ollama;
+import de.asedem.exception.OllamaConnectionException;
+import de.asedem.model.ModelInfo;
+import de.asedem.rest.HttpMethode;
+import de.asedem.rest.Rest;
+import de.asedem.rest.RestResponse;
+import org.junit.jupiter.api.Test;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class ShowInfoServiceTest {
+
+    @Test
+    void testMethodCall() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/show"), HttpMethode.POST, "llama2:latest"))
+                    .thenReturn(new RestResponse(200, """
+                            {
+                              "license": "MIT",
+                              "modelfile": "# Modelfile",
+                              "parameters": "num_ctx 4096",
+                              "template": "{{ .Prompt }}"
+                            }
+                            """));
+
+            final ModelInfo modelInfo = ollama.showInfo("llama2:latest");
+
+            assertEquals("MIT", modelInfo.license());
+            assertEquals("# Modelfile", modelInfo.modelFile());
+            assertEquals("num_ctx 4096", modelInfo.parameters());
+            assertEquals("{{ .Prompt }}", modelInfo.template());
+        }
+    }
+
+    @Test
+    void testException() {
+
+        final Ollama ollama = Ollama.initDefault();
+
+        try (MockedStatic<Rest> utilities = Mockito.mockStatic(Rest.class)) {
+            utilities.when(() -> Rest.requestSync(ollama.buildUrl("/api/show"), HttpMethode.POST, "llama2:latest"))
+                    .thenThrow(new IOException());
+
+            assertThrows(OllamaConnectionException.class, () -> ollama.showInfo("llama2:latest"));
+        }
+    }
+}