diff --git a/testdroid/__init__.py b/testdroid/__init__.py
index b92ffa0..9aee5d2 100755
--- a/testdroid/__init__.py
+++ b/testdroid/__init__.py
@@ -437,7 +437,7 @@ def stop_device_session(self, device_session_id):
     """ Get all test runs for a project
     """
     def get_project_test_runs(self, project_id, limit=20):
-        return self.get(path = "me/projects/%s/runs" & project_id, payload = {'limit': limit})
+        return self.get(path = "me/projects/%s/runs" % (project_id), payload = {'limit': limit})
 
     """ Print test runs of a project to console
     """
@@ -453,7 +453,7 @@ def get_test_run(self, project_id, test_run_id):
 
     """ Return device runs for a project
     """
-    def get_device_runs(self, project_id, test_run_id, limit=1000):
+    def get_device_runs(self, project_id, test_run_id, limit=0):
         return self.get(path = "me/projects/%s/runs/%s/device-runs" % (project_id, test_run_id), payload = {'limit': limit})
 
     """ Downloads screenshots list for a device run