diff --git a/src/test/test_funktionen.c b/src/test/test_funktionen.c
index 04aa2a7..7161783 100644
--- a/src/test/test_funktionen.c
+++ b/src/test/test_funktionen.c
@@ -222,4 +222,13 @@ void test_cosineDegrees(void) {
     // Add more test cases for different inputs and expected outputs
 }
 
+void test_tangentDegrees(void) {
+    float result = tangentDegrees(30.0);
+    TEST_ASSERT_FLOAT_WITHIN(0.000001, 0.5773503, result);
+    // Add more test cases for different inputs and expected outputs
+}
+
+
+
+
 #endif
\ No newline at end of file