diff --git a/.harness.json b/.harness.json
index 261b5b7..40874b2 100644
--- a/.harness.json
+++ b/.harness.json
@@ -5,22 +5,13 @@
         "laravel/prompts"
     ],
     "allow_commands": [
-        {
-            "command": "new",
-            "reason": "the installer is named for the tool, like laravel new; renaming it would change the public API of the CLI"
-        },
-        {
-            "command": "self-update",
-            "reason": "the command is named for the tool, like composer self-update; renaming it would change the public API of the CLI"
-        },
-        {
-            "command": "version",
-            "reason": "the command is named for the tool; renaming it would change the public API of the CLI"
-        }
+        { "command": "new", "reason": "the installer is named for the tool, like laravel new; renaming it would change the public API of the CLI" },
+        { "command": "self-update", "reason": "the command is named for the tool, like composer self-update; renaming it would change the public API of the CLI" },
+        { "command": "version", "reason": "the command is named for the tool; renaming it would change the public API of the CLI" }
     ],
     "ratchet": {
         "phpstan_level": 8,
         "phpstan_baseline": 0,
-        "coverage": 36.86
+        "coverage": 92
     }
 }
diff --git a/tests/Support/Sandbox.php b/tests/Support/Sandbox.php
index 27f779a..9541f38 100644
--- a/tests/Support/Sandbox.php
+++ b/tests/Support/Sandbox.php
@@ -29,6 +29,9 @@ final class Sandbox
     /** @var array<string, mixed> */
     private array $originalServer = [];
 
+    /** @var array<string, mixed> */
+    private array $originalSuperEnv = [];
+
     public function __construct()
     {
         $this->root = realpath(sys_get_temp_dir()).'/pollora-cli-'.bin2hex(random_bytes(6));
@@ -61,9 +64,16 @@ public function env(string $name, string $value): void
             $this->originalServer[$name] = $_SERVER[$name] ?? null;
         }
 
-        // Symfony Process only passes on the variables that $_SERVER also knows.
+        if (! array_key_exists($name, $this->originalSuperEnv)) {
+            $this->originalSuperEnv[$name] = $_ENV[$name] ?? null;
+        }
+
+        // Symfony Process builds the environment of a child from the variables that $_SERVER also knows,
+        // then lets $_ENV override them: $_ENV is empty with the php.ini of macOS (variables_order GPCS)
+        // and filled on Linux, where it would bring back the original PATH. Both are set.
         putenv($name.'='.$value);
         $_SERVER[$name] = $value;
+        $_ENV[$name] = $value;
     }
 
     /**
@@ -129,6 +139,14 @@ public function restore(): void
             }
         }
 
+        foreach ($this->originalSuperEnv as $name => $value) {
+            if ($value === null) {
+                unset($_ENV[$name]);
+            } else {
+                $_ENV[$name] = $value;
+            }
+        }
+
         self::removeTree($this->root);
     }