diff --git a/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java b/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java
index d3710ab..3ffa0fc 100644
--- a/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java
+++ b/src/test/java/ch/zhaw/gartenverwaltung/io/JsonTaskDatabaseTest.java
@@ -4,44 +4,117 @@ import ch.zhaw.gartenverwaltung.types.Task;
 import org.junit.jupiter.api.*;
 
 import java.io.IOException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
 import java.util.Date;
 import java.util.List;
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 public class JsonTaskDatabaseTest {
 
     TaskDatabase testDatabase;
-    SimpleDateFormat formatter = new SimpleDateFormat("dd.MM.yyyy");
-    @BeforeEach
-    void connectToDb() {
-        // testDatabase = new JsonTaskDatabase();
-    }
+    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
 
+    private final URL dbDataSource = this.getClass().getResource("taskdb.json");
+    private final URL testFile = this.getClass().getResource("test-taskdb.json");
+
+    @BeforeEach
+    void connectToDb() throws URISyntaxException, IOException {
+        assertNotNull(testFile);
+        assertNotNull(dbDataSource);
+        Files.copy(Path.of(testFile.toURI()), Path.of(dbDataSource.toURI()), StandardCopyOption.REPLACE_EXISTING);
+        testDatabase = new JsonTaskDatabase();
+    }
 
     @Test
     @DisplayName("Check if results are retrieved completely")
-    void getTasks(){
-        /*
-        List<Task> taskList=null;
+    void getTasks() {
+
+        List<Task> taskList = null;
         try {
-            taskList = testDatabase.getTaskList(formatter.parse("01.05.2022"), formatter.parse("01.08.2022"));
+            taskList = testDatabase.getTaskList(LocalDate.parse("30.04.2022", formatter),
+                    LocalDate.parse("31.05.2022", formatter));
         } catch (IOException e) {
             throw new RuntimeException(e);
-        } catch (ParseException e) {
-            throw new RuntimeException(e);
         }
 
-        Assertions.assertTrue(taskList.size()>0);
-        */
+        Assertions.assertEquals(3, taskList.size());
+
+    }
+
+    //@Disabled("disabled until idProvider works")
+    @Test
+    @DisplayName("Add task.")
+    void addTask() {
+        Task task = new Task("Testtask", "This is a test Task.", LocalDate.parse("01.05.2022", formatter), 1);
+        try {
+            testDatabase.saveTask(task);
+            List<Task> taskList = null;
+            try {
+                taskList = testDatabase.getTaskList(LocalDate.parse("30.04.2022", formatter),
+                        LocalDate.parse("31.05.2022", formatter));
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+
+            Assertions.assertEquals(4, taskList.size());
+
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
     }
 
+    @Test
+    @DisplayName("Remove task.")
+    void removeTask() {
+        Task task = new Task("Dummy", "Dummy", LocalDate.parse("31.05.2022", formatter), 1).withId(2);
+        try {
+            testDatabase.removeTask(task);
+            List<Task> taskList = null;
+
+            taskList = testDatabase.getTaskList(LocalDate.parse("30.04.2022", formatter),
+                    LocalDate.parse("31.05.2022", formatter));
+
+            Assertions.assertEquals(2, taskList.size());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+
+
     @Test
     void getTaskForCrop() {
-        // TODO implement Test
+        List<Task> taskList = null;
+        try {
+            taskList = testDatabase.getTaskForCrop(0);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        Assertions.assertEquals(6, taskList.size());
+
     }
 
     @Test
     void removeTasksForCrop() {
-        // TODO implement Test
+        List<Task> taskList = null;
+        try {
+            testDatabase.removeTasksForCrop(0);
+            taskList = testDatabase.getTaskForCrop(0);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        Assertions.assertEquals(0, taskList.size());
     }
 }
diff --git a/src/test/resources/ch/zhaw/gartenverwaltung/io/test-taskdb.json b/src/test/resources/ch/zhaw/gartenverwaltung/io/test-taskdb.json
new file mode 100644
index 0000000..ff69563
--- /dev/null
+++ b/src/test/resources/ch/zhaw/gartenverwaltung/io/test-taskdb.json
@@ -0,0 +1,56 @@
+[
+  {
+  "id" : 1,
+  "name" : "sow plant",
+  "description": "Plant the seeds, crops in de bed.",
+  "startDate" : "2022-05-01",
+  "endDate" : "2022-05-01",
+  "interval" : 0,
+    "cropId" : 0
+  },
+  {
+    "id" : 2,
+    "name" : "water plant",
+    "description": "water the plant, so that the soil is wet around the plant.",
+    "startDate" : "2022-05-01",
+    "endDate" : "2022-09-01",
+    "interval" : 2,
+    "cropId" : 0
+  },
+  {
+    "id" : 3,
+    "name" : "fertilize plant",
+    "description": "The fertilizer has to be mixed with water. Then fertilize the plants soil with the mixture",
+    "startDate" : "2022-06-01",
+    "endDate" : "2022-08-01",
+    "interval" : 28,
+    "cropId" : 0
+  },
+  {
+    "id" : 4,
+    "name" : "covering plant",
+    "description": "Take a big enough coverage for the plants. Cover the whole plant with a bit space between the plant and the coverage",
+    "startDate" : "2022-07-01",
+    "endDate" : "2022-07-01",
+    "interval" : 0,
+    "cropId" : 0
+  },
+  {
+    "id" : 5,
+    "name" : "look after plant",
+    "description": "Look for pest or illness at the leaves of the plant. Check the soil around the plant, if the roots are enough covered with soil",
+    "startDate" : "2022-05-01",
+    "endDate" : "2022-09-01",
+    "interval" : 5,
+    "cropId" : 0
+  },
+  {
+    "id" : 6,
+    "name" : "harvest plant",
+    "description": "Pull the ripe vegetables out from the soil. Clean them with clear, fresh water. ",
+    "startDate" : "2022-09-01",
+    "endDate" : "2022-09-01",
+    "interval" : 0,
+    "cropId" : 0
+  }
+]
\ No newline at end of file