diff --git a/tests/Unit/Channels/DiskChannelTest.php b/tests/Unit/Channels/DiskChannelTest.php
index 4133cbd..c24eeff 100644
--- a/tests/Unit/Channels/DiskChannelTest.php
+++ b/tests/Unit/Channels/DiskChannelTest.php
@@ -52,5 +52,7 @@ public function testSignal()
         $this->filesystem->shouldReceive('disk->put')->with('foo.txt', '2019-10-23 09:25:23');
 
         $this->channel->signal('foo.txt');
+
+        $this->assertTrue(true);
     }
 }
diff --git a/tests/Unit/Channels/FileChannelTest.php b/tests/Unit/Channels/FileChannelTest.php
index f495781..58bc322 100644
--- a/tests/Unit/Channels/FileChannelTest.php
+++ b/tests/Unit/Channels/FileChannelTest.php
@@ -52,5 +52,7 @@ public function testSignal()
         $this->filesystem->shouldReceive('put')->with('foo.txt', '2019-10-23 09:25:23');
 
         $this->channel->signal('foo.txt');
+
+        $this->assertTrue(true);
     }
 }
diff --git a/tests/Unit/Channels/HttpChannelTest.php b/tests/Unit/Channels/HttpChannelTest.php
index b6538ba..621d430 100644
--- a/tests/Unit/Channels/HttpChannelTest.php
+++ b/tests/Unit/Channels/HttpChannelTest.php
@@ -47,5 +47,7 @@ public function testSignal()
         $this->httpClient->shouldReceive('request')->with('get', 'https://foo.bar', []);
 
         $this->channel->signal('https://foo.bar');
+
+        $this->assertTrue(true);
     }
 }