Format and changelog

diff --git a/pkgs/package_config/CHANGELOG.md b/pkgs/package_config/CHANGELOG.md
index b3a1f3f..8e7e74f 100644
--- a/pkgs/package_config/CHANGELOG.md
+++ b/pkgs/package_config/CHANGELOG.md

@@ -22,6 +22,8 @@
 - Adds `PackageConfig.minVersion` to complement `.maxVersion`.
   Currently both are `2`.
 
+- Uses `package:checks` for testing.
+
 ## 2.2.0
 
 - Add relational operators to `LanguageVersion` with extension methods

diff --git a/pkgs/package_config/test/discovery_test.dart b/pkgs/package_config/test/discovery_test.dart
index 56fa35a..d997ad5 100644
--- a/pkgs/package_config/test/discovery_test.dart
+++ b/pkgs/package_config/test/discovery_test.dart

@@ -420,9 +420,7 @@
 File configFile(Directory directory) {
   var s = Platform.pathSeparator;
   var path = directory.path;
-  return File(
-    '$path${_ifNeeded(path, s)}.dart_tool${s}package_config.json',
-  );
+  return File('$path${_ifNeeded(path, s)}.dart_tool${s}package_config.json');
 }
 
 Directory subDir(Directory directory, String name) {

diff --git a/pkgs/package_config/test/discovery_uri_test.dart b/pkgs/package_config/test/discovery_uri_test.dart
index 000561a..dbcc787 100644
--- a/pkgs/package_config/test/discovery_uri_test.dart
+++ b/pkgs/package_config/test/discovery_uri_test.dart

@@ -79,8 +79,7 @@
         Uri file;
         (:config, :file) =
             (await findPackageConfigAndUri(directory, loader: loader))!;
-        check(
-          config).version.equals(
+        check(config).version.equals(
           PackageConfig.minVersion,
         ); // Found package_config.json file.
         validatePackagesFile(config, directory);

diff --git a/pkgs/package_config/test/parse_test.dart b/pkgs/package_config/test/parse_test.dart
index dd76c8d..5b0e0be 100644
--- a/pkgs/package_config/test/parse_test.dart
+++ b/pkgs/package_config/test/parse_test.dart

@@ -84,10 +84,9 @@
         ..root.equals(Uri.parse('file:///foo/'))
         ..packageUriRoot.equals(Uri.parse('file:///foo/lib/'))
         ..languageVersion.isNotNull().equals(LanguageVersion(2, 5))
-        ..extraData
-            .isNotNull()
-            .isA<Map<Object?, Object?>>()
-            .deepEquals({'nonstandard': true})
+        ..extraData.isNotNull().isA<Map<Object?, Object?>>().deepEquals({
+          'nonstandard': true,
+        })
         ..hasAbsoluteRoot;
 
       var bar = checkConfig['bar'];
@@ -115,9 +114,10 @@
 
       checkConfig.extraData.isNotNull().isA<Map<Object?, Object?>>().deepEquals(
         {
-        'generator': 'pub',
-        'other': [42],
-      });
+          'generator': 'pub',
+          'other': [42],
+        },
+      );
     });
 
     test('valid other order', () {
@@ -172,9 +172,10 @@
           .equals(Uri.parse('file:///tmp/lib/baz.dart'));
       checkConfig.extraData.isNotNull().isA<Map<Object?, Object?>>().deepEquals(
         {
-        'generator': 'pub',
-        'other': [42],
-      });
+          'generator': 'pub',
+          'other': [42],
+        },
+      );
     });
 
     // Check that a few minimal configurations are valid.