diff --git a/data/Controller/ValidReadonlyController.php b/data/Controller/ValidReadonlyController.php
new file mode 100644
index 0000000..71e3c7e
--- /dev/null
+++ b/data/Controller/ValidReadonlyController.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+readonly class ValidReadonlyController
+{
+    // This class is already readonly, so no error should be reported
+}
+
diff --git a/data/MaxLineLengthMultipleLines.php b/data/MaxLineLengthMultipleLines.php
new file mode 100644
index 0000000..1d908d9
--- /dev/null
+++ b/data/MaxLineLengthMultipleLines.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App;
+
+class MaxLineLengthMultipleLines // This line is exactly 95 characters long to test multiple violations in one file
+{
+    public function methodWithMultipleVeryLongLinesThatExceedTheMaximumAllowedLengthOfEightyCharacters(): void
+    {
+        $variable = 'This is a short line';
+        // All good here
+    }
+}
+
diff --git a/data/MethodSignatureMustMatch/TestClass.php b/data/MethodSignatureMustMatch/TestClass.php
index a02fefb..a1ea1cc 100644
--- a/data/MethodSignatureMustMatch/TestClass.php
+++ b/data/MethodSignatureMustMatch/TestClass.php
@@ -1,5 +1,9 @@
 <?php
 
+class DummyClass
+{
+}
+
 class TestClass
 {
     public function testMethod(int $a)
@@ -13,4 +17,39 @@ public function testMethodNoType($x, string $y)
     public function testMethodWithWrongType(int $x, int $y)
     {
     }
+
+    // Test max parameters violation
+    public function testMaxParams(int $a, string $b, int $c, string $d)
+    {
+    }
+
+    // Test parameter name pattern mismatch
+    public function testNameMismatch(int $wrongName, string $anotherWrong)
+    {
+    }
+
+    // Test nullable types
+    public function testNullableTypes(?int $nullableInt, ?string $nullableString)
+    {
+    }
+
+    // Test class types
+    public function testClassTypes(DummyClass $dummy, string $name)
+    {
+    }
+
+    // Test protected visibility
+    protected function testProtectedMethod(int $value)
+    {
+    }
+
+    // Test method without visibility requirement (should pass)
+    public function testNoVisibilityReq(int $x)
+    {
+    }
+
+    // Test valid method matching all criteria
+    public function testValidMethod(int $alpha, string $beta)
+    {
+    }
 }
diff --git a/data/TooManyArgumentsClass.php b/data/TooManyArgumentsClass.php
index 1162bf1..d3df9ff 100644
--- a/data/TooManyArgumentsClass.php
+++ b/data/TooManyArgumentsClass.php
@@ -8,4 +8,29 @@ public function methodWithTooManyArguments(int $arg1, int $arg2, int $arg3, int
     {
         // Method implementation
     }
+
+    public function validMethod(int $arg1, int $arg2): void
+    {
+        // Valid method with acceptable number of arguments
+    }
+}
+
+namespace App\Service;
+
+class TooManyArgsService
+{
+    public function methodWithTooManyArguments(int $a, int $b, int $c, int $d, int $e): void
+    {
+        // This should trigger error when pattern matches Service
+    }
+}
+
+namespace App\Other;
+
+class TooManyArgsOther
+{
+    public function methodWithTooManyArguments(int $a, int $b, int $c, int $d, int $e): void
+    {
+        // This should NOT trigger error when pattern doesn't match
+    }
 }
diff --git a/tests/TestCases/Architecture/ClassMustBeFinalRuleWithAbstractNotIgnoredTest.php b/tests/TestCases/Architecture/ClassMustBeFinalRuleWithAbstractNotIgnoredTest.php
new file mode 100644
index 0000000..0a8bb2c
--- /dev/null
+++ b/tests/TestCases/Architecture/ClassMustBeFinalRuleWithAbstractNotIgnoredTest.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Phauthentic\PHPStanRules\Tests\TestCases\Architecture;
+
+use Phauthentic\PHPStanRules\Architecture\ClassMustBeFinalRule;
+use PHPStan\Testing\RuleTestCase;
+
+/**
+ * @extends RuleTestCase<ClassMustBeFinalRule>
+ */
+class ClassMustBeFinalRuleWithAbstractNotIgnoredTest extends RuleTestCase
+{
+    protected function getRule(): \PHPStan\Rules\Rule
+    {
+        // Do NOT ignore abstract classes
+        return new ClassMustBeFinalRule(
+            patterns: ['/Service$/'],
+            ignoreAbstractClasses: false
+        );
+    }
+
+    public function testConcreteClassMustBeFinal(): void
+    {
+        // Test that concrete (non-abstract) classes are checked when ignoreAbstractClasses is false
+        // This ensures the flag doesn't prevent checking of regular classes
+        $this->analyse([__DIR__ . '/../../../data/Service/MissingFinalRuleService.php'], [
+            [
+                'Class App\Service\MissingFinalRuleService must be final.',
+                5,
+            ],
+        ]);
+    }
+}
+
diff --git a/tests/TestCases/Architecture/ClassMustBeReadonlyRuleTest.php b/tests/TestCases/Architecture/ClassMustBeReadonlyRuleTest.php
index 18d9511..24076f6 100644
--- a/tests/TestCases/Architecture/ClassMustBeReadonlyRuleTest.php
+++ b/tests/TestCases/Architecture/ClassMustBeReadonlyRuleTest.php
@@ -34,4 +34,10 @@ public function testRule(): void
         // the test fails, if the expected error does not occur,
         // or if there are other errors reported beside the expected one
     }
+
+    public function testValidReadonlyClass(): void
+    {
+        // Test that readonly classes don't trigger errors
+        $this->analyse([__DIR__ . '/../../../data/Controller/ValidReadonlyController.php'], []);
+    }
 }
diff --git a/tests/TestCases/Architecture/MethodSignatureMustMatchRuleTest.php b/tests/TestCases/Architecture/MethodSignatureMustMatchRuleTest.php
index 3605760..b7239dc 100644
--- a/tests/TestCases/Architecture/MethodSignatureMustMatchRuleTest.php
+++ b/tests/TestCases/Architecture/MethodSignatureMustMatchRuleTest.php
@@ -46,6 +46,71 @@ protected function getRule(): Rule
                 ],
                 'visibilityScope' => 'public',
             ],
+            [
+                'pattern' => '/^TestClass::testMaxParams$/',
+                'minParameters' => 1,
+                'maxParameters' => 2,
+                'signature' => [],
+                'visibilityScope' => 'public',
+            ],
+            [
+                'pattern' => '/^TestClass::testNameMismatch$/',
+                'minParameters' => 2,
+                'maxParameters' => 2,
+                'signature' => [
+                    ['type' => 'int', 'pattern' => '/^param/'], // Name pattern doesn't match
+                    ['type' => 'string', 'pattern' => '/^param/'], // Name pattern doesn't match
+                ],
+                'visibilityScope' => 'public',
+            ],
+            [
+                'pattern' => '/^TestClass::testNullableTypes$/',
+                'minParameters' => 2,
+                'maxParameters' => 2,
+                'signature' => [
+                    ['type' => '?int', 'pattern' => '/^nullable/'],
+                    ['type' => '?string', 'pattern' => '/^nullable/'],
+                ],
+                'visibilityScope' => 'public',
+            ],
+            [
+                'pattern' => '/^TestClass::testClassTypes$/',
+                'minParameters' => 2,
+                'maxParameters' => 2,
+                'signature' => [
+                    ['type' => 'DummyClass', 'pattern' => '/^dummy/'],
+                    ['type' => 'string', 'pattern' => '/^name/'],
+                ],
+                'visibilityScope' => 'public',
+            ],
+            [
+                'pattern' => '/^TestClass::testProtectedMethod$/',
+                'minParameters' => 1,
+                'maxParameters' => 1,
+                'signature' => [
+                    ['type' => 'int', 'pattern' => '/^value/'],
+                ],
+                'visibilityScope' => 'protected',
+            ],
+            [
+                'pattern' => '/^TestClass::testNoVisibilityReq$/',
+                'minParameters' => 1,
+                'maxParameters' => 1,
+                'signature' => [
+                    ['type' => 'int', 'pattern' => '/^x/'],
+                ],
+                // No visibilityScope specified
+            ],
+            [
+                'pattern' => '/^TestClass::testValidMethod$/',
+                'minParameters' => 2,
+                'maxParameters' => 2,
+                'signature' => [
+                    ['type' => 'int', 'pattern' => '/^alpha/'],
+                    ['type' => 'string', 'pattern' => '/^beta/'],
+                ],
+                'visibilityScope' => 'public',
+            ],
         ]);
     }
 
@@ -55,15 +120,15 @@ public function testRule(): void
             // Errors for testMethod (type checking enabled)
             [
                 'Method TestClass::testMethod has 1 parameters, but at least 2 required.',
-                5,
+                9,
             ],
             [
                 'Method TestClass::testMethod is missing parameter #2 of type string.',
-                5,
+                9,
             ],
             [
                 'Method TestClass::testMethod must be private.',
-                5,
+                9,
             ],
             // No errors for testMethodNoType since:
             // - First parameter has no type specified, so type checking is skipped
@@ -76,8 +141,34 @@ public function testRule(): void
             // - Second parameter has no type specified, so type checking is skipped
             [
                 'Method TestClass::testMethodWithWrongType parameter #1 should be of type string, int given.',
-                13,
+                17,
+            ],
+            
+            // Errors for testMaxParams - exceeds max parameters
+            [
+                'Method TestClass::testMaxParams has 4 parameters, but at most 2 allowed.',
+                22,
+            ],
+            
+            // Errors for testNameMismatch - parameter names don't match patterns
+            [
+                'Method TestClass::testNameMismatch parameter #1 name "wrongName" does not match pattern /^param/.',
+                27,
+            ],
+            [
+                'Method TestClass::testNameMismatch parameter #2 name "anotherWrong" does not match pattern /^param/.',
+                27,
             ],
+            
+            // No errors for testNullableTypes - nullable types should match correctly
+            
+            // No errors for testClassTypes - class types should match correctly
+            
+            // No errors for testProtectedMethod - protected visibility matches
+            
+            // No errors for testNoVisibilityReq - no visibility requirement specified
+            
+            // No errors for testValidMethod - everything matches correctly
         ]);
     }
 }
diff --git a/tests/TestCases/CleanCode/MaxLineLengthRuleIgnoreUseTest.php b/tests/TestCases/CleanCode/MaxLineLengthRuleIgnoreUseTest.php
new file mode 100644
index 0000000..286d796
--- /dev/null
+++ b/tests/TestCases/CleanCode/MaxLineLengthRuleIgnoreUseTest.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Phauthentic\PHPStanRules\Tests\TestCases\CleanCode;
+
+use Phauthentic\PHPStanRules\CleanCode\MaxLineLengthRule;
+use PHPStan\Rules\Rule;
+use PHPStan\Testing\RuleTestCase;
+
+/**
+ * @extends RuleTestCase<MaxLineLengthRule>
+ */
+class MaxLineLengthRuleIgnoreUseTest extends RuleTestCase
+{
+    protected function getRule(): Rule
+    {
+        // Ignore use statements (3rd parameter is true)
+        return new MaxLineLengthRule(80, [], true);
+    }
+
+    public function testUseStatementsAreIgnored(): void
+    {
+        // All use statements in this file are very long, but should be ignored
+        $this->analyse([__DIR__ . '/../../../data/MaxLineLengthUseStatementsClass.php'], []);
+    }
+}
+
diff --git a/tests/TestCases/CleanCode/MaxLineLengthRuleTest.php b/tests/TestCases/CleanCode/MaxLineLengthRuleTest.php
index bcc78e2..25d9a84 100644
--- a/tests/TestCases/CleanCode/MaxLineLengthRuleTest.php
+++ b/tests/TestCases/CleanCode/MaxLineLengthRuleTest.php
@@ -28,28 +28,18 @@ public function testRule(): void
         ]);
     }
 
-    public function testRuleWithExcludePatterns(): void
+    public function testMultipleLongLinesInFile(): void
     {
-        $rule = new MaxLineLengthRule(80, ['/.*Excluded.*/']);
-
-        $this->analyse([__DIR__ . '/../../../data/MaxLineLengthExcludedClass.php'], [
+        // Test that multiple long lines in the same file are all detected
+        $this->analyse([__DIR__ . '/../../../data/MaxLineLengthMultipleLines.php'], [
             [
-                'Line 7 exceeds the maximum length of 80 characters (found 81 characters).',
-                7,
+                'Line 5 exceeds the maximum length of 80 characters (found 115 characters).',
+                5,
             ],
             [
-                'Line 9 exceeds the maximum length of 80 characters (found 86 characters).',
-                9,
+                'Line 7 exceeds the maximum length of 80 characters (found 110 characters).',
+                7,
             ],
         ]);
     }
-
-
-
-    public function testRuleWithIgnoreUseStatements(): void
-    {
-        $rule = new MaxLineLengthRule(80, [], true);
-
-        $this->analyse([__DIR__ . '/../../../data/MaxLineLengthUseStatementsClass.php'], []);
-    }
 }
diff --git a/tests/TestCases/CleanCode/MaxLineLengthRuleWithExclusionTest.php b/tests/TestCases/CleanCode/MaxLineLengthRuleWithExclusionTest.php
new file mode 100644
index 0000000..1573329
--- /dev/null
+++ b/tests/TestCases/CleanCode/MaxLineLengthRuleWithExclusionTest.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Phauthentic\PHPStanRules\Tests\TestCases\CleanCode;
+
+use Phauthentic\PHPStanRules\CleanCode\MaxLineLengthRule;
+use PHPStan\Rules\Rule;
+use PHPStan\Testing\RuleTestCase;
+
+/**
+ * @extends RuleTestCase<MaxLineLengthRule>
+ */
+class MaxLineLengthRuleWithExclusionTest extends RuleTestCase
+{
+    protected function getRule(): Rule
+    {
+        // Exclude files matching "Excluded" in their path
+        return new MaxLineLengthRule(80, ['/.*Excluded.*/']);
+    }
+
+    public function testExcludedFileIsNotChecked(): void
+    {
+        // This file should be excluded, so no errors should be reported
+        $this->analyse([__DIR__ . '/../../../data/MaxLineLengthExcludedClass.php'], []);
+    }
+
+    public function testNonExcludedFileIsChecked(): void
+    {
+        // This file is NOT excluded, so errors should be reported
+        $this->analyse([__DIR__ . '/../../../data/MaxLineLengthTestClass.php'], [
+            [
+                'Line 7 exceeds the maximum length of 80 characters (found 84 characters).',
+                7,
+            ],
+        ]);
+    }
+}
+
diff --git a/tests/TestCases/CleanCode/TooManyArgumentsRuleTest.php b/tests/TestCases/CleanCode/TooManyArgumentsRuleTest.php
index 36aca39..2334830 100644
--- a/tests/TestCases/CleanCode/TooManyArgumentsRuleTest.php
+++ b/tests/TestCases/CleanCode/TooManyArgumentsRuleTest.php
@@ -25,6 +25,14 @@ public function testRule(): void
                 'Method App\TooManyArgumentsClass::methodWithTooManyArguments has too many arguments (4). Maximum allowed is 3.',
                 7,
             ],
+            [
+                'Method App\Service\TooManyArgsService::methodWithTooManyArguments has too many arguments (5). Maximum allowed is 3.',
+                22,
+            ],
+            [
+                'Method App\Other\TooManyArgsOther::methodWithTooManyArguments has too many arguments (5). Maximum allowed is 3.',
+                32,
+            ],
         ]);
     }
 }
diff --git a/tests/TestCases/CleanCode/TooManyArgumentsRuleWithPatternsTest.php b/tests/TestCases/CleanCode/TooManyArgumentsRuleWithPatternsTest.php
new file mode 100644
index 0000000..75124f9
--- /dev/null
+++ b/tests/TestCases/CleanCode/TooManyArgumentsRuleWithPatternsTest.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Phauthentic\PHPStanRules\Tests\TestCases\CleanCode;
+
+use Phauthentic\PHPStanRules\CleanCode\TooManyArgumentsRule;
+use PHPStan\Rules\Rule;
+use PHPStan\Testing\RuleTestCase;
+
+/**
+ * @extends RuleTestCase<TooManyArgumentsRule>
+ */
+class TooManyArgumentsRuleWithPatternsTest extends RuleTestCase
+{
+    protected function getRule(): Rule
+    {
+        // Only apply to classes ending with "Service"
+        return new TooManyArgumentsRule(3, ['/Service$/']);
+    }
+
+    public function testRuleWithPatterns(): void
+    {
+        $this->analyse([__DIR__ . '/../../../data/TooManyArgumentsClass.php'], [
+            [
+                'Method App\Service\TooManyArgsService::methodWithTooManyArguments has too many arguments (5). Maximum allowed is 3.',
+                22,
+            ],
+            // TooManyArgumentsClass and TooManyArgsOther should NOT trigger errors because patterns don't match
+        ]);
+    }
+}
+