diff --git a/homepage/participo/testApi.py b/homepage/participo/testApi.py
index 9c8456b..7ab5eb7 100755
--- a/homepage/participo/testApi.py
+++ b/homepage/participo/testApi.py
@@ -26,7 +26,7 @@ class TestApi:
         argParser.add_argument("--input",
                                "-i",
                                type=argparse.FileType("r"),
-                               default="-")
+                               default=None)
         argParser.add_argument("--output",
                                "-o",
                                type=argparse.FileType("w"),
@@ -54,7 +54,7 @@ class TestApi:
             host=self.config.host,
             url="/".join([self.config.path, self.config.endpoint]),
             headers={"Authorization": f"Basic {self.config.key}"},
-            input=load_json(self.config.input))
+            input=load_json(self.config.input) if self.config.input is not None else None)
 
 
 def load_json(jsonFile):