diff --git a/rachiopy/rachioobject.py b/rachiopy/rachioobject.py
index 11e4122..4eec922 100644
--- a/rachiopy/rachioobject.py
+++ b/rachiopy/rachioobject.py
@@ -33,7 +33,7 @@ def __init__(self, authtoken: str, http_session=None, timeout=25):
         self.timeout = timeout
 
     def _request(self, path: str, method: str, body=None):
-        """Make a request from the API.
+        """Make a request to the API.
 
         :return: The return value is a tuple of (response, content), the first
             being and instance of the httplib2.Response class, the second
@@ -103,7 +103,7 @@ def delete_request(self, path: str, body=None):
         return self._request(path, "DELETE", body)
 
     def _valve_request(self, path: str, method: str, body=None):
-        """Make a request from the API.
+        """Make a request to the API.
 
         :return: The return value is a tuple of (response, content), the first
             being and instance of the httplib2.Response class, the second
diff --git a/tests/test_valve.py b/tests/test_valve.py
index a4e5b65..d9ab8e7 100644
--- a/tests/test_valve.py
+++ b/tests/test_valve.py
@@ -110,12 +110,21 @@ def test_set_default_runtime(self, mock):
             ),
         )
 
+    @patch("requests.Session.request")
+    def test_set_default_runtime_exception(self, mock):
+        """Test if the set_default_runtime method catches incorrect values."""
+        mock.return_value = RESPONSE200
+
+        valveid = str(uuid.uuid4())
+        duration1 = randrange(-50, -1)
+        duration2 = randrange(86401, 86500)
+
         # Check that values should be within range.
         self.assertRaises(
-            AssertionError, self.valve.start_watering, valveid, -1
+            AssertionError, self.valve.start_watering, valveid, duration1
         )
         self.assertRaises(
-            AssertionError, self.valve.start_watering, valveid, 86401
+            AssertionError, self.valve.start_watering, valveid, duration2
         )
 
     @patch("requests.Session.request")
@@ -138,12 +147,21 @@ def test_start_watering(self, mock):
             json.dumps({"valveId": valveid, "durationSeconds": duration}),
         )
 
+    @patch("requests.Session.request")
+    def test_start_watering_exception(self, mock):
+        """Test if the start_watering method catches incorrect values."""
+        mock.return_value = RESPONSE204
+
+        valveid = str(uuid.uuid4())
+        duration1 = randrange(-50, -1)
+        duration2 = randrange(86401, 86500)
+
         # Check that values should be within range.
         self.assertRaises(
-            AssertionError, self.valve.start_watering, valveid, -1
+            AssertionError, self.valve.start_watering, valveid, duration1
         )
         self.assertRaises(
-            AssertionError, self.valve.start_watering, valveid, 86401
+            AssertionError, self.valve.start_watering, valveid, duration2
         )
 
     @patch("requests.Session.request")