diff --git a/examples/psalm/call.php b/examples/psalm/call.php
index c929bea..390114f 100644
--- a/examples/psalm/call.php
+++ b/examples/psalm/call.php
@@ -9,7 +9,6 @@ use function Amp\Promise\wait;
  */
 function accept(string $param)
 {
-
 }
 
 $coroutine = call(function (): \Generator {
@@ -44,5 +43,3 @@ accept(wait(call(function (): \Generator {
 accept(wait(call(function (): string {
     return 'foobar';
 })));
-
-
diff --git a/examples/psalm/coroutine.php b/examples/psalm/coroutine.php
index 9904b40..8fc446d 100644
--- a/examples/psalm/coroutine.php
+++ b/examples/psalm/coroutine.php
@@ -8,7 +8,6 @@ use function Amp\Promise\wait;
  */
 function accept(string $param)
 {
-
 }
 
 $coroutine = coroutine(function (): \Generator {
@@ -19,5 +18,3 @@ $coroutine = coroutine(function (): \Generator {
 
 // psalm-expect InvalidScalarArgument
 accept(wait($coroutine()));
-
-
diff --git a/test/PsalmTest.php b/test/PsalmTest.php
index 61f432e..65fd7d6 100644
--- a/test/PsalmTest.php
+++ b/test/PsalmTest.php
@@ -6,24 +6,33 @@ use PHPUnit\Framework\TestCase;
 
 class PsalmTest extends TestCase
 {
+    /**
+     * @requires PHP >= 7.1
+     */
     public function test()
     {
-        $issues = \json_decode(\shell_exec('./vendor/bin/psalm --output-format=json --no-progress --config=psalm.examples.xml'),
-            true);
+        $issues = \json_decode(
+            \shell_exec('./vendor/bin/psalm --output-format=json --no-progress --config=psalm.examples.xml'),
+            true
+        );
 
         foreach ($issues as $issue) {
             $file = \file_get_contents($issue['file_path']);
             $fileLines = \explode("\n", $file);
 
             if (!\preg_match('(// psalm-expect (.*))', $fileLines[$issue['line_from'] - 2] ?? '', $match)) {
-                $this->fail('Psalm reports an issue that isn\'t marked as expected: ' . \json_encode($issue,
-                        \JSON_PRETTY_PRINT));
+                $this->fail('Psalm reports an issue that isn\'t marked as expected: ' . \json_encode(
+                    $issue,
+                    \JSON_PRETTY_PRINT
+                ));
             }
 
             $expectedIssues = \array_map('trim', \explode(',', $match[1]));
             if (!\in_array($issue['type'], $expectedIssues, true)) {
-                $this->fail('Psalm reports an issue that isn\'t marked as expected: ' . \json_encode($issue,
-                        \JSON_PRETTY_PRINT));
+                $this->fail('Psalm reports an issue that isn\'t marked as expected: ' . \json_encode(
+                    $issue,
+                    \JSON_PRETTY_PRINT
+                ));
             }
         }