diff --git a/gns3server/controller/link.py b/gns3server/controller/link.py
index 302b4fa7..77d45959 100644
--- a/gns3server/controller/link.py
+++ b/gns3server/controller/link.py
@@ -99,7 +99,6 @@ class Link:
         self._capturing = False
         self._project.controller.notification.emit("link.updated", self.__json__())
 
-
     @asyncio.coroutine
     def read_pcap_from_source(self):
         """
diff --git a/tests/controller/test_link.py b/tests/controller/test_link.py
index ba19deda..46b5ef97 100644
--- a/tests/controller/test_link.py
+++ b/tests/controller/test_link.py
@@ -117,3 +117,24 @@ def test_default_capture_file_name(project, compute, async_run):
     async_run(link.add_node(node1, 0, 4))
     async_run(link.add_node(node2, 1, 3))
     assert link.default_capture_file_name() == "Hello_0-4_to_w0rld_1-3.pcap"
+
+
+def test_start_capture(link, async_run, tmpdir, project, controller):
+    @asyncio.coroutine
+    def fake_reader():
+        return AsyncioBytesIO()
+
+    link.read_pcap_from_source = fake_reader
+    controller._notification = MagicMock()
+    async_run(link.start_capture(capture_file_name="test.pcap"))
+    assert link._capturing
+    assert link._capture_file_name == "test.pcap"
+    controller._notification.emit.assert_called_with("link.updated", link.__json__())
+
+
+def test_stop_capture(link, async_run, tmpdir, project, controller):
+    link._capturing = True
+    controller._notification = MagicMock()
+    async_run(link.stop_capture())
+    assert link._capturing is False
+    controller._notification.emit.assert_called_with("link.updated", link.__json__())