diff --git a/tests/test_metadata.py b/tests/test_metadata.py
new file mode 100644
index 00000000..23896706
--- /dev/null
+++ b/tests/test_metadata.py
@@ -0,0 +1,56 @@
+import os
+import sys
+import unittest
+import json
+
+class MetadataTest(unittest.TestCase):
+
+    def get_installed_lib_version(self, lib_name:str):
+        dirs = [f for f in os.listdir(os.path.join(sys.exec_prefix, 'Lib', 'site-packages')) if f.startswith(lib_name.replace('-', '_')+'-')]
+        if len(dirs) == 1:
+            metadata_file = os.path.join(sys.exec_prefix, 'Lib', 'site-packages', dirs[0], 'METADATA')
+            with open(metadata_file, 'r') as f:
+                for l in f.readlines():
+                    if l.startswith('Version: '):
+                        return l.replace('Version: ', '').strip()    
+            return None
+        return None
+
+    def get_version_of_installed_eltako14bus(self):
+        return self.get_installed_lib_version('eltako14bus')
+
+    def get_manifest(self):
+        manifest_filename = os.path.join(os.getcwd(), 'custom_components', 'eltako', 'manifest.json')
+        with open(manifest_filename, 'r') as f:
+            return json.loads( f.read() )
+
+    def get_version_of_required_eltako14bus(self):
+        manifest = self.get_manifest()
+
+        for r in manifest['requirements']:
+            if r.startswith('eltako14bus'):
+                return r.split('==')[1].strip()
+        return None
+    
+    def test_check_all_installed_dependencies(self):
+        manifest = self.get_manifest()
+
+        for r in manifest['requirements']:
+            if '==' in r:
+                lib_name = r.split('==')[0].strip()
+                required_version  = r.split('==')[1].strip()
+                installed_version = self.get_installed_lib_version(lib_name)
+
+                # if this test fails install specified libraries in manifest.json
+                self.assertEqual(required_version, installed_version)
+
+
+        return None
+
+    def test_eltako14bus_required_and_installed_is_the_same(self):
+        installed = self.get_version_of_installed_eltako14bus()
+        required = self.get_version_of_required_eltako14bus()
+
+        self.assertIsNotNone(installed)
+        self.assertIsNotNone(required)
+        self.assertEqual(installed, required)
\ No newline at end of file
diff --git a/tests/test_send_message_service.py b/tests/test_send_message_service.py
index a7745aa5..35d5f06c 100644
--- a/tests/test_send_message_service.py
+++ b/tests/test_send_message_service.py
@@ -7,6 +7,8 @@
 import os
 import json
 
+from tests.test_metadata import MetadataTest
+
 dispatcher.dispatcher_send = mock.Mock(return_value=None)
 
 class TestSendMessageService(unittest.IsolatedAsyncioTestCase):
@@ -48,38 +50,13 @@ async def test_send_message(self):
 
             await g.async_service_send_message(event, True)
 
-    def get_version_of_installed_eltako14bus(self):
-        dirname = [f for f in os.listdir(os.path.join(sys.exec_prefix, 'Lib', 'site-packages')) if f.startswith('eltako14bus')][0]
-        metadata_file = os.path.join(sys.exec_prefix, 'Lib', 'site-packages', dirname, 'METADATA')
-        with open(metadata_file, 'r') as f:
-            for l in f.readlines():
-                if l.startswith('Version: '):
-                    return l.replace('Version: ', '').strip()
-        return None
-    
-    def get_version_of_required_eltako14bus(self):
-        manifest_filename = os.path.join(os.getcwd(), 'custom_components', 'eltako', 'manifest.json')
-        with open(manifest_filename, 'r') as f:
-            manifest = json.loads( f.read() )
-
-        for r in manifest['requirements']:
-            if r.startswith('eltako14bus'):
-                return r.split('==')[1].strip()
-        return None
-
-    async def test_eltako14bus_required_and_installed_is_the_same(self):
-        installed = self.get_version_of_installed_eltako14bus()
-        required = self.get_version_of_required_eltako14bus()
-
-        self.assertIsNotNone(installed)
-        self.assertIsNotNone(required)
-        self.assertEqual(installed, required)
 
     async def test_write_eep_params_to_docs_file(self):
         text  = '# Paramters for EEPs in Send Message Events \n'
         
+        eltakobus_version = MetadataTest().get_version_of_installed_eltako14bus()
         text += f'(This file was auto-generated by using [eltako14bus library](https://github.com/grimmpp/eltako14bus/blob/master/eltakobus/eep.py) '
-        text += f'in [version {self.get_version_of_installed_eltako14bus()}](https://pypi.org/project/eltako14bus/).)\n'
+        text += f'in [version {eltakobus_version}](https://pypi.org/project/eltako14bus/).)\n'
         text += '\n'
 
         text += "## Not Supported EEPs \n"