diff --git a/.travis.yml b/.travis.yml
index f1d2fa1..9bc9e12 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ php:
   - 7.0
   - 7.1
   - 7.2
+  - 7.3
   - hhvm # ignore errors, see below
 
 # lock distro so new future defaults will not break the build
diff --git a/composer.json b/composer.json
index d2aec73..7fe0bc3 100644
--- a/composer.json
+++ b/composer.json
@@ -19,13 +19,13 @@
     },
     "require": {
         "php": ">=5.3",
-        "react/stream": "^1.0 || ^0.7 || ^0.6 || ^0.5 || ^0.4 || ^0.3",
+        "react/stream": "^1.0 || ^0.7 || ^0.6 || ^0.5 || ^0.4.6",
         "react/promise": "^2.1 || ^1.2"
     },
     "require-dev": {
         "react/event-loop": "^1.0 || ^0.5 || ^0.4 || ^0.3",
         "react/promise-timer": "^1.0",
         "clue/block-react": "^1.0",
-        "phpunit/phpunit": "^6.4 || ^5.7 || ^4.8.35"
+        "phpunit/phpunit": "^7.0 || ^6.4 || ^5.7 || ^4.8.35"
     }
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index f373698..a40caa1 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -7,7 +7,7 @@
          convertWarningsToExceptions="true"
 >
     <testsuites>
-        <testsuite>
+        <testsuite name="PromiseStream Test Suite">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
diff --git a/tests/UnwrapWritableTest.php b/tests/UnwrapWritableTest.php
index ec120e7..ffa115a 100644
--- a/tests/UnwrapWritableTest.php
+++ b/tests/UnwrapWritableTest.php
@@ -318,24 +318,20 @@ public function testClosingStreamWillCloseInputStream()
 
     public function testClosingStreamWillCloseStreamIfItIgnoredCancellationAndResolvesLater()
     {
-        $this->markTestIncomplete();
-
         $input = new ThroughStream();
+        $input->on('close', $this->expectCallableOnce());
 
-        $loop = $this->loop;
-        $promise = new Promise\Promise(function ($resolve) use ($loop, $input) {
-            $loop->addTimer(0.001, function () use ($resolve, $input) {
-                $resolve($input);
-            });
-        });
+        $deferred = new Deferred();
 
-        $stream = Stream\unwrapReadable($promise);
+        $stream = Stream\unwrapReadable($deferred->promise());
 
         $stream->on('close', $this->expectCallableOnce());
 
         $stream->close();
 
-        Block\await($promise, $this->loop);
+        $this->assertTrue($input->isReadable());
+
+        $deferred->resolve($input);
 
         $this->assertFalse($input->isReadable());
     }