diff --git a/src/Illuminate/Foundation/Configuration/Middleware.php b/src/Illuminate/Foundation/Configuration/Middleware.php
index 22195364f43e..30e60ed98238 100644
--- a/src/Illuminate/Foundation/Configuration/Middleware.php
+++ b/src/Illuminate/Foundation/Configuration/Middleware.php
@@ -418,9 +418,7 @@ public function getGlobalMiddleware()
         ]));
 
         $middleware = array_map(function ($middleware) {
-            return isset($this->replacements[$middleware])
-                ? $this->replacements[$middleware]
-                : $middleware;
+            return $this->replacements[$middleware] ?? $middleware;
         }, $middleware);
 
         return array_values(array_filter(
diff --git a/src/Illuminate/Process/FakeInvokedProcess.php b/src/Illuminate/Process/FakeInvokedProcess.php
index 7c445a73f4ff..c82f53c869d1 100644
--- a/src/Illuminate/Process/FakeInvokedProcess.php
+++ b/src/Illuminate/Process/FakeInvokedProcess.php
@@ -226,7 +226,7 @@ public function latestOutput()
             $this->nextOutputIndex = $i + 1;
         }
 
-        return isset($output) ? $output : '';
+        return $output ?? '';
     }
 
     /**
@@ -249,7 +249,7 @@ public function latestErrorOutput()
             $this->nextErrorOutputIndex = $i + 1;
         }
 
-        return isset($output) ? $output : '';
+        return $output ?? '';
     }
 
     /**
diff --git a/src/Illuminate/Queue/Queue.php b/src/Illuminate/Queue/Queue.php
index 8a69b6837666..df7b8ec21cc5 100755
--- a/src/Illuminate/Queue/Queue.php
+++ b/src/Illuminate/Queue/Queue.php
@@ -360,11 +360,7 @@ protected function shouldDispatchAfterCommit($job)
             return $job->afterCommit;
         }
 
-        if (isset($this->dispatchAfterCommit)) {
-            return $this->dispatchAfterCommit;
-        }
-
-        return false;
+        return $this->dispatchAfterCommit ?? false;
     }
 
     /**
diff --git a/src/Illuminate/Testing/Concerns/RunsInParallel.php b/src/Illuminate/Testing/Concerns/RunsInParallel.php
index 4a6c475a5bc0..667504343020 100644
--- a/src/Illuminate/Testing/Concerns/RunsInParallel.php
+++ b/src/Illuminate/Testing/Concerns/RunsInParallel.php
@@ -121,9 +121,7 @@ public function execute(): int
             });
         }
 
-        return $potentialExitCode === null
-            ? $this->getExitCode()
-            : $potentialExitCode;
+        return $potentialExitCode ?? $this->getExitCode();
     }
 
     /**