diff --git a/composer.lock b/composer.lock
index 3fe4ee88..457a4b7f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,16 +8,16 @@
     "packages": [
         {
             "name": "composer/ca-bundle",
-            "version": "1.3.4",
+            "version": "1.3.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "69098eca243998b53eed7a48d82dedd28b447cd5"
+                "reference": "74780ccf8c19d6acb8d65c5f39cd72110e132bbd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/69098eca243998b53eed7a48d82dedd28b447cd5",
-                "reference": "69098eca243998b53eed7a48d82dedd28b447cd5",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/74780ccf8c19d6acb8d65c5f39cd72110e132bbd",
+                "reference": "74780ccf8c19d6acb8d65c5f39cd72110e132bbd",
                 "shasum": ""
             },
             "require": {
@@ -64,7 +64,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/ca-bundle/issues",
-                "source": "https://github.com/composer/ca-bundle/tree/1.3.4"
+                "source": "https://github.com/composer/ca-bundle/tree/1.3.5"
             },
             "funding": [
                 {
@@ -80,7 +80,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-10-12T12:08:29+00:00"
+            "time": "2023-01-11T08:27:00+00:00"
         },
         {
             "name": "composer/class-map-generator",
@@ -157,16 +157,16 @@
         },
         {
             "name": "composer/composer",
-            "version": "2.5.1",
+            "version": "2.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/composer.git",
-                "reference": "923278ad13e1621946eb76ab2882655d2cc396a4"
+                "reference": "c76c013c555160410af47c03a0e173518e3f5796"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/composer/zipball/923278ad13e1621946eb76ab2882655d2cc396a4",
-                "reference": "923278ad13e1621946eb76ab2882655d2cc396a4",
+                "url": "https://api.github.com/repos/composer/composer/zipball/c76c013c555160410af47c03a0e173518e3f5796",
+                "reference": "c76c013c555160410af47c03a0e173518e3f5796",
                 "shasum": ""
             },
             "require": {
@@ -250,7 +250,7 @@
             "support": {
                 "irc": "ircs://irc.libera.chat:6697/composer",
                 "issues": "https://github.com/composer/composer/issues",
-                "source": "https://github.com/composer/composer/tree/2.5.1"
+                "source": "https://github.com/composer/composer/tree/2.5.2"
             },
             "funding": [
                 {
@@ -266,7 +266,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-12-22T14:33:54+00:00"
+            "time": "2023-02-04T13:33:22+00:00"
         },
         {
             "name": "composer/metadata-minifier",
@@ -2060,16 +2060,16 @@
         },
         {
             "name": "symfony/finder",
-            "version": "v6.2.0",
+            "version": "v6.2.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "eb2355f69519e4ef33f1835bca4c935f5d42e570"
+                "reference": "c90dc446976a612e3312a97a6ec0069ab0c2099c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/eb2355f69519e4ef33f1835bca4c935f5d42e570",
-                "reference": "eb2355f69519e4ef33f1835bca4c935f5d42e570",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/c90dc446976a612e3312a97a6ec0069ab0c2099c",
+                "reference": "c90dc446976a612e3312a97a6ec0069ab0c2099c",
                 "shasum": ""
             },
             "require": {
@@ -2104,7 +2104,7 @@
             "description": "Finds files and directories via an intuitive fluent interface",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/finder/tree/v6.2.0"
+                "source": "https://github.com/symfony/finder/tree/v6.2.5"
             },
             "funding": [
                 {
@@ -2120,7 +2120,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-10-09T08:55:40+00:00"
+            "time": "2023-01-20T17:45:48+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -2695,16 +2695,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v6.2.0",
+            "version": "v6.2.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "ba6e55359f8f755fe996c58a81e00eaa67a35877"
+                "reference": "9ead139f63dfa38c4e4a9049cc64a8b2748c83b7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/ba6e55359f8f755fe996c58a81e00eaa67a35877",
-                "reference": "ba6e55359f8f755fe996c58a81e00eaa67a35877",
+                "url": "https://api.github.com/repos/symfony/process/zipball/9ead139f63dfa38c4e4a9049cc64a8b2748c83b7",
+                "reference": "9ead139f63dfa38c4e4a9049cc64a8b2748c83b7",
                 "shasum": ""
             },
             "require": {
@@ -2736,7 +2736,7 @@
             "description": "Executes commands in sub-processes",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/process/tree/v6.2.0"
+                "source": "https://github.com/symfony/process/tree/v6.2.5"
             },
             "funding": [
                 {
@@ -2752,7 +2752,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-11-02T09:08:04+00:00"
+            "time": "2023-01-01T08:38:09+00:00"
         },
         {
             "name": "symfony/service-contracts",
@@ -3956,16 +3956,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "10.0.0",
+            "version": "10.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "c4c60c34c0e92045afce938510f8878d7cd84f8a"
+                "reference": "140897d407ce1c9e0b6b5ced8663d442af7c5560"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/c4c60c34c0e92045afce938510f8878d7cd84f8a",
-                "reference": "c4c60c34c0e92045afce938510f8878d7cd84f8a",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/140897d407ce1c9e0b6b5ced8663d442af7c5560",
+                "reference": "140897d407ce1c9e0b6b5ced8663d442af7c5560",
                 "shasum": ""
             },
             "require": {
@@ -4036,7 +4036,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.0.0"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/10.0.3"
             },
             "funding": [
                 {
@@ -4052,7 +4052,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-02-03T07:16:15+00:00"
+            "time": "2023-02-04T13:39:07+00:00"
         },
         {
             "name": "sebastian/cli-parser",
diff --git a/src/Package/Writer.php b/src/Package/Writer.php
index 2ccdc49f..28c6a5fc 100644
--- a/src/Package/Writer.php
+++ b/src/Package/Writer.php
@@ -27,7 +27,7 @@ public function dumpFiles(Package $package, string $dir): array
         $paths = [];
 
         $this->filesystem->dumpFile(
-            $paths[] = "${dir}/composer.json",
+            $paths[] = "{$dir}/composer.json",
             $composerJsonContent
         );
 
diff --git a/tests/Package/PackageTest.php b/tests/Package/PackageTest.php
index 086f3337..dca6033c 100644
--- a/tests/Package/PackageTest.php
+++ b/tests/Package/PackageTest.php
@@ -13,6 +13,8 @@
 
 class PackageTest extends TestCase
 {
+    private Package $builder;
+
     public Package $pkgA;
     public Package $pkgAAlpha;
     public Package $pkgB;