diff --git a/flathunter/crawler/immowelt.py b/flathunter/crawler/immowelt.py
index 5dc1076e..4117607e 100644
--- a/flathunter/crawler/immowelt.py
+++ b/flathunter/crawler/immowelt.py
@@ -86,7 +86,9 @@ def extract_data(self, soup: BeautifulSoup):
 
             id_element = adv.find("a")
             try:
-                url = "https://immowelt.de" + id_element.get("href")
+                url = id_element.get("href")
+                if "https" not in url:
+                    url = "https://immowelt.de/" + url
             except IndexError:
                 continue
 
diff --git a/test/crawler/test_crawl_immowelt.py b/test/crawler/test_crawl_immowelt.py
index d482856d..3aa4592d 100644
--- a/test/crawler/test_crawl_immowelt.py
+++ b/test/crawler/test_crawl_immowelt.py
@@ -6,10 +6,10 @@
 
 DUMMY_CONFIG = """
 urls:
-  - https://www.immowelt.de/liste/muenchen/wohnungen/mieten?roomi=2&primi=600&prima=1000
+  - https://www.immowelt.de/classified-search?distributionTypes=Rent&estateTypes=House,Apartment&locations=AD08DE8634&order=Default&m=homepage_new_search_classified_search_result
     """
 
-TEST_URL = 'https://www.immowelt.de/liste/berlin/wohnungen/mieten?roomi=2&prima=1500&wflmi=70&sort=createdate%2Bdesc'
+TEST_URL = 'https://www.immowelt.de/classified-search?distributionTypes=Rent&estateTypes=House,Apartment&locations=AD08DE8634&order=Default&m=homepage_new_search_classified_search_result'
 
 @pytest.fixture
 def crawler():