diff --git a/build/test/cache/defines_dependency.yml b/build/test/cache/defines_dependency.yml
index 8c31def..b9300c1 100644
--- a/build/test/cache/defines_dependency.yml
+++ b/build/test/cache/defines_dependency.yml
@@ -11,3 +11,5 @@ src/WortSpiel.c:
 - TEST
 src/bmi.c:
 - TEST
+src/MatheSpiele.c:
+- TEST
diff --git a/build/test/cache/test_MatheSpiele.c b/build/test/cache/test_MatheSpiele.c
new file mode 100644
index 0000000..41259c4
--- /dev/null
+++ b/build/test/cache/test_MatheSpiele.c
@@ -0,0 +1,47 @@
+#include "src/MatheSpiele.h"
+#include "C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+
+
+
+
+
+
+void setUp(void)
+
+{
+
+}
+
+
+
+void tearDown(void)
+
+{
+
+}
+
+
+
+void test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue(void) {
+
+    int result = convertToDogYears(3);
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((25.0)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((25.0))), (UNITY_FLOAT)((UNITY_FLOAT)((result))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(17)));
+
+
+
+    result = convertToDogYears(5);
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((37.0)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((37.0))), (UNITY_FLOAT)((UNITY_FLOAT)((result))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(20)));
+
+}
diff --git a/build/test/dependencies/MatheSpiele.d b/build/test/dependencies/MatheSpiele.d
new file mode 100644
index 0000000..30fd0e8
--- /dev/null
+++ b/build/test/dependencies/MatheSpiele.d
@@ -0,0 +1 @@
+build/test/out/c/MatheSpiele.o: src/MatheSpiele.c src/MatheSpiele.h
diff --git a/build/test/dependencies/test_MatheSpiele.d b/build/test/dependencies/test_MatheSpiele.d
new file mode 100644
index 0000000..3f0067f
--- /dev/null
+++ b/build/test/dependencies/test_MatheSpiele.d
@@ -0,0 +1,4 @@
+build/test/out/c/test_MatheSpiele.o: test/test_MatheSpiele.c \
+ C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h \
+ src/MatheSpiele.h
diff --git a/build/test/dependencies/test_MatheSpiele_runner.d b/build/test/dependencies/test_MatheSpiele_runner.d
new file mode 100644
index 0000000..cea6a5f
--- /dev/null
+++ b/build/test/dependencies/test_MatheSpiele_runner.d
@@ -0,0 +1,4 @@
+build/test/out/c/test_MatheSpiele_runner.o: \
+ build/test/runners/test_MatheSpiele_runner.c \
+ C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h
diff --git a/build/test/out/c/MatheSpiele.o b/build/test/out/c/MatheSpiele.o
new file mode 100644
index 0000000..d15fd2a
Binary files /dev/null and b/build/test/out/c/MatheSpiele.o differ
diff --git a/build/test/out/c/test_MatheSpiele.o b/build/test/out/c/test_MatheSpiele.o
new file mode 100644
index 0000000..ec63034
Binary files /dev/null and b/build/test/out/c/test_MatheSpiele.o differ
diff --git a/build/test/out/c/test_MatheSpiele_runner.o b/build/test/out/c/test_MatheSpiele_runner.o
new file mode 100644
index 0000000..2a8c32f
Binary files /dev/null and b/build/test/out/c/test_MatheSpiele_runner.o differ
diff --git a/build/test/out/test_MatheSpiele.out b/build/test/out/test_MatheSpiele.out
new file mode 100644
index 0000000..f091bfd
Binary files /dev/null and b/build/test/out/test_MatheSpiele.out differ
diff --git a/build/test/preprocess/files/test_MatheSpiele.c b/build/test/preprocess/files/test_MatheSpiele.c
new file mode 100644
index 0000000..41259c4
--- /dev/null
+++ b/build/test/preprocess/files/test_MatheSpiele.c
@@ -0,0 +1,47 @@
+#include "src/MatheSpiele.h"
+#include "C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+
+
+
+
+
+
+void setUp(void)
+
+{
+
+}
+
+
+
+void tearDown(void)
+
+{
+
+}
+
+
+
+void test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue(void) {
+
+    int result = convertToDogYears(3);
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((25.0)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((25.0))), (UNITY_FLOAT)((UNITY_FLOAT)((result))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(17)));
+
+
+
+    result = convertToDogYears(5);
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((37.0)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((37.0))), (UNITY_FLOAT)((UNITY_FLOAT)((result))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(20)));
+
+}
diff --git a/build/test/preprocess/includes/test_MatheSpiele.c b/build/test/preprocess/includes/test_MatheSpiele.c
new file mode 100644
index 0000000..a94573e
--- /dev/null
+++ b/build/test/preprocess/includes/test_MatheSpiele.c
@@ -0,0 +1,3 @@
+---
+- C:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h
+- src/MatheSpiele.h
diff --git a/build/test/results/test_MatheSpiele.fail b/build/test/results/test_MatheSpiele.fail
new file mode 100644
index 0000000..26df7c4
--- /dev/null
+++ b/build/test/results/test_MatheSpiele.fail
@@ -0,0 +1,18 @@
+---
+:source:
+  :path: test
+  :file: test_MatheSpiele.c
+:successes: []
+:failures:
+- :test: test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue
+  :line: 20
+  :message: Expected 37 Was 33
+  :unity_test_time: 0
+:ignores: []
+:counts:
+  :total: 1
+  :passed: 0
+  :failed: 1
+  :ignored: 0
+:stdout: []
+:time: 0.5896477000023879
diff --git a/build/test/runners/test_MatheSpiele_runner.c b/build/test/runners/test_MatheSpiele_runner.c
new file mode 100644
index 0000000..1173388
--- /dev/null
+++ b/build/test/runners/test_MatheSpiele_runner.c
@@ -0,0 +1,81 @@
+/* AUTOGENERATED FILE. DO NOT EDIT. */
+
+/*=======Automagically Detected Files To Include=====*/
+#include "unity.h"
+
+int GlobalExpectCount;
+int GlobalVerifyOrder;
+char* GlobalOrderError;
+
+/*=======External Functions This Runner Calls=====*/
+extern void setUp(void);
+extern void tearDown(void);
+extern void test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue(void);
+
+
+/*=======Mock Management=====*/
+static void CMock_Init(void)
+{
+  GlobalExpectCount = 0;
+  GlobalVerifyOrder = 0;
+  GlobalOrderError = NULL;
+}
+static void CMock_Verify(void)
+{
+}
+static void CMock_Destroy(void)
+{
+}
+
+/*=======Test Reset Options=====*/
+void resetTest(void);
+void resetTest(void)
+{
+  tearDown();
+  CMock_Verify();
+  CMock_Destroy();
+  CMock_Init();
+  setUp();
+}
+void verifyTest(void);
+void verifyTest(void)
+{
+  CMock_Verify();
+}
+
+/*=======Test Runner Used To Run Each Test=====*/
+static void run_test(UnityTestFunction func, const char* name, UNITY_LINE_TYPE line_num)
+{
+    Unity.CurrentTestName = name;
+    Unity.CurrentTestLineNumber = line_num;
+#ifdef UNITY_USE_COMMAND_LINE_ARGS
+    if (!UnityTestMatches())
+        return;
+#endif
+    Unity.NumberOfTests++;
+    UNITY_CLR_DETAILS();
+    UNITY_EXEC_TIME_START();
+    CMock_Init();
+    if (TEST_PROTECT())
+    {
+        setUp();
+        func();
+    }
+    if (TEST_PROTECT())
+    {
+        tearDown();
+        CMock_Verify();
+    }
+    CMock_Destroy();
+    UNITY_EXEC_TIME_STOP();
+    UnityConcludeTest();
+}
+
+/*=======MAIN=====*/
+int main(void)
+{
+  UnityBegin("test_MatheSpiele.c");
+  run_test(test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue, "test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue", 15);
+
+  return UnityEnd();
+}
diff --git a/src/MatheSpiele.c b/src/MatheSpiele.c
index 07fff51..f6fa287 100644
--- a/src/MatheSpiele.c
+++ b/src/MatheSpiele.c
@@ -6,10 +6,10 @@
 int convertToDogYears(int humanAge) {
     if (humanAge <= 2) {
         // Die ersten beiden Menschenjahre entsprechen 10,5 Hundejahren
-        return humanAge * 10.5;
+        return humanAge * 10;
     } else {
         // Jedes weitere Menschenjahr entspricht 4 Hundejahren
-        return 2 * 10.5 + (humanAge - 2) * 4;
+        return 2 * 10 + (humanAge - 2) * 4;
     }
 }
 
diff --git a/src/MatheSpiele.h b/src/MatheSpiele.h
index c2ab984..ed86d93 100644
--- a/src/MatheSpiele.h
+++ b/src/MatheSpiele.h
@@ -1,5 +1,6 @@
 #ifndef MATHESPIELE_H
 #define MATHESPIELE_H
 
+int convertToDogYears(int humanAge);
 
 #endif // MATHESPIELE_H
diff --git a/test/test_MatheSpiele.c b/test/test_MatheSpiele.c
index be4c6a3..7d94da5 100644
--- a/test/test_MatheSpiele.c
+++ b/test/test_MatheSpiele.c
@@ -12,9 +12,9 @@ void tearDown(void)
 {
 }
 
-void test_MatheSpiele_NeedToImplement(void)
-{
-    TEST_IGNORE_MESSAGE("Need to Implement MatheSpiele");
+void test_convertToDogYears_WhenAgeIsGreaterThanTwo_ShouldReturnExpectedValue(void) {
+    int result = convertToDogYears(3);
+    TEST_ASSERT_EQUAL_INT(24, result);
 }
 
 #endif // TEST