diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 35eb1ddfbbc029bcab630581847471d7f238ec53..38781555edf5f3a26edb9f21ef928e2eda156f1f 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -2,5 +2,6 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/StringCalculator" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/interfaces.py b/src/interfaces.py
index 7a3cc8e1962344df1a13d7895841f695451edb06..386cace279b05d126d9b5ed73ee758a43ae5223b 100644
--- a/src/interfaces.py
+++ b/src/interfaces.py
@@ -4,8 +4,3 @@ class IRomanNumber(ABC):
     @abstractmethod
     def convert(self, n: int) -> str:
         pass
-
-class IStringCalculator(ABC):
-    @abstractmethod
-    def add(self, numbers: str) -> int:
-        pass
\ No newline at end of file
diff --git a/src/stringcalculator.py b/src/stringcalculator.py
deleted file mode 100644
index 41f666fdc4d0e39d619a00d678088cdbfca15376..0000000000000000000000000000000000000000
--- a/src/stringcalculator.py
+++ /dev/null
@@ -1,7 +0,0 @@
-from src.interfaces import IStringCalculator
-
-class StringCalculator(IStringCalculator):
-    def add(self, numbers: str) -> int:
-        if not numbers:
-            return 0
-        return sum(map(int, numbers.split(',')))
\ No newline at end of file
diff --git a/tests/test_stringcalculator.py b/tests/test_stringcalculator.py
deleted file mode 100644
index f7c4c1221c4d42297357b1fccd3569a34afc3a21..0000000000000000000000000000000000000000
--- a/tests/test_stringcalculator.py
+++ /dev/null
@@ -1,28 +0,0 @@
-# Basis
-# Bei Eingabe keiner Zahl soll eine 0 ausgegeben werden
-# Bei Eingabe einer 1 soll 1 ausgegeben werden
-# Bei Eingabe einer 3,4 soll 7 ausgegeben werden
-# Bei Eingabe einer 10,20 soll 30 ausgegeben werden
-
-import unittest
-from src.interfaces import IStringCalculator
-from src.stringcalculator import StringCalculator
-
-class TestStringCalculator(unittest.TestCase):
-    def setUp(self):
-        self.calculator: IStringCalculator = StringCalculator()  # Zugriff über das Interface
-
-    def test_add_empty_string(self):
-        self.assertEqual(self.calculator.add(""), 0)
-
-    def test_add_single_number(self):
-        self.assertEqual(self.calculator.add("1"), 1)
-
-    def test_add_two_numbers(self):
-        self.assertEqual(self.calculator.add("10,20"), 30)
-
-if __name__ == "__main__":
-    unittest.main()
-
-# python -m unittest tests.test_stringcalculator
-# python -m unittest discover -s tests
\ No newline at end of file