diff --git a/tests/src/Unit/Adapter/Psr7/ResponseTest.php b/tests/src/Unit/Adapter/Psr7/ResponseTest.php
index 9afc448f..da47b32b 100644
--- a/tests/src/Unit/Adapter/Psr7/ResponseTest.php
+++ b/tests/src/Unit/Adapter/Psr7/ResponseTest.php
@@ -27,30 +27,6 @@ protected function setUp(): void
         );
     }
 
-    public function testGetStatusCode(): void
-    {
-        $this->assertEquals(200, $this->response->getStatusCode());
-    }
-
-    public function testWithStatus(): void
-    {
-        $withStatus = $this->response->withStatus(404, 'Not Found');
-        $this->assertEquals(404, $withStatus->getStatusCode());
-        $this->assertEquals('Not Found', $withStatus->getReasonPhrase());
-    }
-
-    public function testGetReasonPhrase(): void
-    {
-        $this->assertEquals('OK', $this->response->getReasonPhrase());
-    }
-
-    public function testGetHarResponse(): void
-    {
-        $harResponse = $this->response->getHarResponse();
-        $this->assertInstanceOf(\Deviantintegral\Har\Response::class, $harResponse);
-        $this->assertEquals(200, $harResponse->getStatus());
-    }
-
     public function testWithHeader(): void
     {
         $withHeader = $this->response->withHeader('X-Test', 'value');
@@ -78,29 +54,6 @@ public function testGetHeaderLineWhenHeaderNotPresent(): void
         $this->assertEquals('', $this->response->getHeaderLine('X-NonExistent'));
     }
 
-    public function testGetHeader(): void
-    {
-        $headers = $this->response->getHeader('Content-Type');
-        $this->assertEquals(['text/html; charset=UTF-8'], $headers);
-    }
-
-    public function testHasHeader(): void
-    {
-        $this->assertTrue($this->response->hasHeader('Content-Type'));
-        $this->assertFalse($this->response->hasHeader('X-NonExistent'));
-    }
-
-    public function testGetHeaders(): void
-    {
-        $headers = $this->response->getHeaders();
-        $this->assertArrayHasKey('Content-Type', $headers);
-    }
-
-    public function testGetProtocolVersion(): void
-    {
-        $this->assertEquals('1.1', $this->response->getProtocolVersion());
-    }
-
     public function testWithProtocolVersion(): void
     {
         $withProtocol = $this->response->withProtocolVersion('2.0');
@@ -113,44 +66,6 @@ public function testWithoutHeader(): void
         $this->assertFalse($withoutHeader->hasHeader('Content-Type'));
     }
 
-    public function testWithAddedHeader(): void
-    {
-        $withAdded = $this->response->withAddedHeader('X-Custom', 'value1');
-        $this->assertEquals(['value1'], $withAdded->getHeader('X-Custom'));
-
-        $withMultiple = $withAdded->withAddedHeader('X-Custom', 'value2');
-        $this->assertEquals(['value1', 'value2'], $withMultiple->getHeader('X-Custom'));
-    }
-
-    public function testWithAddedHeaderArrayValue(): void
-    {
-        $withAdded = $this->response->withAddedHeader('X-Custom', ['value1', 'value2']);
-        $this->assertEquals(['value1', 'value2'], $withAdded->getHeader('X-Custom'));
-    }
-
-    public function testGetBody(): void
-    {
-        $body = $this->response->getBody();
-        $this->assertInstanceOf(\Psr\Http\Message\StreamInterface::class, $body);
-
-        // Verify the body content matches the response content
-        $bodyContent = $body->getContents();
-        $this->assertNotEmpty($bodyContent);
-    }
-
-    public function testWithBody(): void
-    {
-        $newBodyContent = 'Test body content';
-        $newBody = \GuzzleHttp\Psr7\Utils::streamFor($newBodyContent);
-
-        $withBody = $this->response->withBody($newBody);
-        $this->assertInstanceOf(Response::class, $withBody);
-
-        // Verify the new body content
-        $resultBody = $withBody->getBody();
-        $this->assertEquals($newBodyContent, $resultBody->getContents());
-    }
-
     public function testWithStatusDoesNotModifyOriginal(): void
     {
         $original = $this->response;
diff --git a/tests/src/Unit/Adapter/Psr7/ServerRequestTest.php b/tests/src/Unit/Adapter/Psr7/ServerRequestTest.php
index b40dd254..0878f96e 100644
--- a/tests/src/Unit/Adapter/Psr7/ServerRequestTest.php
+++ b/tests/src/Unit/Adapter/Psr7/ServerRequestTest.php
@@ -168,7 +168,6 @@ public function testGetAttributes(): void
     public function testGetAttribute(): void
     {
         // Attributes are not part of HAR spec, always returns default
-        $this->assertNull($this->serverRequest->getAttribute('custom_attr'));
         $this->assertNull($this->serverRequest->getAttribute('nonexistent'));
         $this->assertEquals('default', $this->serverRequest->getAttribute('nonexistent', 'default'));
     }
diff --git a/tests/src/Unit/BrowserTest.php b/tests/src/Unit/BrowserTest.php
deleted file mode 100644
index 7dac2790..00000000
--- a/tests/src/Unit/BrowserTest.php
+++ /dev/null
@@ -1,73 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Deviantintegral\Har\Tests\Unit;
-
-use Deviantintegral\Har\Browser;
-
-/**
- * @covers \Deviantintegral\Har\Browser
- */
-class BrowserTest extends HarTestBase
-{
-    public function testSerialize(): void
-    {
-        $serializer = $this->getSerializer();
-        $browser = (new Browser())
-          ->setName('BrowserTest')
-          ->setVersion('1.0')
-          ->setComment('Test case');
-        $serialized = $serializer->serialize($browser, 'json');
-        $this->assertEquals(
-            [
-                'name' => 'BrowserTest',
-                'version' => '1.0',
-                'comment' => 'Test case',
-            ],
-            json_decode($serialized, true)
-        );
-
-        $deserialized = $serializer->deserialize(
-            $serialized,
-            Browser::class,
-            'json'
-        );
-        $this->assertEquals($browser, $deserialized);
-    }
-
-    public function testGet(): void
-    {
-        $browser = (new Browser())
-          ->setName('BrowserTest')
-          ->setVersion('1.0')
-          ->setComment('Test case');
-
-        $this->assertEquals('BrowserTest', $browser->getName());
-        $this->assertEquals('1.0', $browser->getVersion());
-        $this->assertEquals('Test case', $browser->getComment());
-    }
-
-    public function testClone(): void
-    {
-        $browser = (new Browser())
-          ->setName('BrowserTest')
-          ->setVersion('1.0')
-          ->setComment('Test case');
-
-        $clonedBrowser = clone $browser;
-
-        // Verify the clone is a different object
-        $this->assertNotSame($browser, $clonedBrowser);
-
-        // Verify the clone has the same property values
-        $this->assertEquals($browser->getName(), $clonedBrowser->getName());
-        $this->assertEquals($browser->getVersion(), $clonedBrowser->getVersion());
-        $this->assertEquals($browser->getComment(), $clonedBrowser->getComment());
-
-        // Verify modifying the clone doesn't affect the original
-        $clonedBrowser->setName('ModifiedBrowser');
-        $this->assertEquals('BrowserTest', $browser->getName());
-        $this->assertEquals('ModifiedBrowser', $clonedBrowser->getName());
-    }
-}
diff --git a/tests/src/Unit/CookieTest.php b/tests/src/Unit/CookieTest.php
index 0818a2d9..9dbc61ad 100644
--- a/tests/src/Unit/CookieTest.php
+++ b/tests/src/Unit/CookieTest.php
@@ -26,11 +26,6 @@ public function testSerialize(): void
           ->setSecure(true)
           ->setValue('Test value');
 
-        $this->assertTrue($cookie->hasSecure());
-        $this->assertNotNull($cookie->isSecure());
-        $this->assertTrue($cookie->hasHttpOnly());
-        $this->assertNotNull($cookie->isHttpOnly());
-
         $serialized = $serializer->serialize($cookie, 'json');
         $this->assertEquals(
             [
@@ -62,9 +57,7 @@ public function testSerializeWithoutOptionalAttributes(): void
             ->setValue('Test value');
 
         $this->assertFalse($cookie->hasSecure());
-        $this->assertNull($cookie->isSecure());
         $this->assertFalse($cookie->hasHttpOnly());
-        $this->assertNull($cookie->isHttpOnly());
 
         $serialized = $serializer->serialize($cookie, 'json');
         $this->assertEquals(
diff --git a/tests/src/Unit/EntryTest.php b/tests/src/Unit/EntryTest.php
index 6209de55..a557392f 100644
--- a/tests/src/Unit/EntryTest.php
+++ b/tests/src/Unit/EntryTest.php
@@ -35,24 +35,6 @@ public function testHasInitiator(): void
         $this->assertTrue($first->hasInitiator());
     }
 
-    public function testSerializationOfEntryWithAddedInitiatorOfTypeOther(): void
-    {
-        // Load a HAR file into an object.
-        $id = 'www.softwareishard.com-empty-login.har';
-        $har = $this->repository->load($id);
-        $first = $har->getLog()->getEntries()[0];
-        $first->setInitiator((new Initiator())->setType('other'));
-
-        $serialized = $this->getSerializer()->serialize($har, 'json');
-        $actual = json_decode($serialized, true);
-        $this->assertIsArray($actual['log']['entries'][0]['_initiator']);
-        $this->assertEquals('other', $actual['log']['entries'][0]['_initiator']['type']);
-        $this->assertArrayNotHasKey('url', $actual['log']['entries'][0]['_initiator']);
-        $this->assertArrayNotHasKey('lineNumber', $actual['log']['entries'][0]['_initiator']);
-
-        $this->assertArrayNotHasKey('_initiator', $actual['log']['entries'][1]);
-    }
-
     public function testGetSetPageref(): void
     {
         $entry = (new Entry())->setPageref('page_1');
diff --git a/tests/src/Unit/HeaderTest.php b/tests/src/Unit/HeaderTest.php
deleted file mode 100644
index 4de81706..00000000
--- a/tests/src/Unit/HeaderTest.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Deviantintegral\Har\Tests\Unit;
-
-use Deviantintegral\Har\Header;
-
-/**
- * @covers \Deviantintegral\Har\Header
- * @covers \Deviantintegral\Har\SharedFields\NameTrait
- * @covers \Deviantintegral\Har\SharedFields\NameValueTrait
- */
-class HeaderTest extends HarTestBase
-{
-    public function testSerialize(): void
-    {
-        $header = (new Header())
-          ->setName('Host')
-          ->setValue('www.example.com')
-          ->setComment('Test value');
-
-        $serializer = $this->getSerializer();
-        $serialized = $serializer->serialize($header, 'json');
-        $this->assertEquals([
-            'name' => 'Host',
-            'value' => 'www.example.com',
-            'comment' => 'Test value',
-        ], json_decode($serialized, true));
-
-        $deserialized = $serializer->deserialize($serialized, Header::class, 'json');
-        $this->assertEquals($header, $deserialized);
-    }
-}
diff --git a/tests/src/Unit/InitiatorTest.php b/tests/src/Unit/InitiatorTest.php
index e20378d0..27b344b0 100644
--- a/tests/src/Unit/InitiatorTest.php
+++ b/tests/src/Unit/InitiatorTest.php
@@ -26,9 +26,7 @@ public function testInitiatorWithTypeOther(): void
 
         $this->assertDeserialize($serialized, Initiator::class, $initiator);
 
-        $this->assertFalse($initiator->hasUrl());
         $this->assertNull($initiator->getUrl());
-        $this->assertFalse($initiator->hasLineNumber());
         $this->assertNull($initiator->getLineNumber());
     }
 
@@ -55,8 +53,6 @@ public function testInitiatorWithTypeParser(): void
         $initiator->setUrl(new Uri('https://www.php.net/'));
         $this->assertDeserialize($serialized, Initiator::class, $initiator);
         $this->assertTrue($initiator->hasLineNumber());
-        $this->assertIsNumeric($initiator->getLineNumber());
         $this->assertTrue($initiator->hasUrl());
-        $this->assertNotNull($initiator->getUrl());
     }
 }
diff --git a/tests/src/Unit/MissingLogKeyTest.php b/tests/src/Unit/MissingLogKeyTest.php
index 4bdc8500..0a68a8cc 100644
--- a/tests/src/Unit/MissingLogKeyTest.php
+++ b/tests/src/Unit/MissingLogKeyTest.php
@@ -4,7 +4,6 @@
 
 namespace Deviantintegral\Har\Tests\Unit;
 
-use Deviantintegral\Har\Repository\HarFileRepository;
 use Deviantintegral\Har\Serializer;
 use JMS\Serializer\Exception\RuntimeException;
 
@@ -13,38 +12,6 @@
  */
 class MissingLogKeyTest extends HarTestBase
 {
-    /**
-     * Tests that deserializeHar() throws RuntimeException when 'log' key is missing.
-     *
-     * Before this fix, the HAR would deserialize successfully but accessing
-     * the log property would throw an Error about uninitialized property.
-     * Now, deserializeHar() validates and throws a proper exception immediately.
-     */
-    public function testMissingLogKeyThrowsException(): void
-    {
-        $repository = new HarFileRepository(__DIR__.'/../../fixtures/edge-cases');
-        $serializer = new Serializer();
-
-        $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('HAR file must contain a "log" key');
-
-        $json = $repository->loadJson('missing-log.har');
-        $serializer->deserializeHar($json);
-    }
-
-    /**
-     * Tests that deserializeHar() throws RuntimeException for invalid JSON structure.
-     */
-    public function testEmptyJsonThrowsException(): void
-    {
-        $serializer = new Serializer();
-
-        $this->expectException(RuntimeException::class);
-        $this->expectExceptionMessage('HAR file must contain a "log" key');
-
-        $serializer->deserializeHar('{}');
-    }
-
     /**
      * Tests that deserializeHar() throws RuntimeException when JSON is not an object.
      */
diff --git a/tests/src/Unit/PageTest.php b/tests/src/Unit/PageTest.php
index a841202e..ab362ad7 100644
--- a/tests/src/Unit/PageTest.php
+++ b/tests/src/Unit/PageTest.php
@@ -38,21 +38,6 @@ public function testSerialize(): void
             ],
             json_decode($serialized, true)
         );
-
-        $deserialized = $serializer->deserialize($serialized, Page::class, 'json');
-        $this->assertEquals($page, $deserialized);
-    }
-
-    public function testGetSetId(): void
-    {
-        $page = (new Page())->setId('page_123');
-        $this->assertEquals('page_123', $page->getId());
-    }
-
-    public function testGetSetTitle(): void
-    {
-        $page = (new Page())->setTitle('Test Page Title');
-        $this->assertEquals('Test Page Title', $page->getTitle());
     }
 
     public function testGetSetPageTimings(): void
diff --git a/tests/src/Unit/PageTimingTest.php b/tests/src/Unit/PageTimingTest.php
index 2e1a24e1..c48955ae 100644
--- a/tests/src/Unit/PageTimingTest.php
+++ b/tests/src/Unit/PageTimingTest.php
@@ -29,12 +29,5 @@ public function testSerialize(): void
             ],
             json_decode($serialized, true)
         );
-
-        $deserialized = $serializer->deserialize(
-            $serialized,
-            PageTimings::class,
-            'json'
-        );
-        $this->assertEquals($creator, $deserialized);
     }
 }
diff --git a/tests/src/Unit/QueryStringTest.php b/tests/src/Unit/QueryStringTest.php
deleted file mode 100644
index c1ce9eff..00000000
--- a/tests/src/Unit/QueryStringTest.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Deviantintegral\Har\Tests\Unit;
-
-use Deviantintegral\Har\QueryString;
-
-/**
- * @covers \Deviantintegral\Har\QueryString
- */
-class QueryStringTest extends HarTestBase
-{
-    public function testSerialize(): void
-    {
-        $query = (new QueryString())
-          ->setName('Host')
-          ->setValue('www.example.com')
-          ->setComment('Test value');
-
-        $serializer = $this->getSerializer();
-        $this->assertEquals(
-            [
-                'name' => 'Host',
-                'value' => 'www.example.com',
-                'comment' => 'Test value',
-            ],
-            json_decode($serializer->serialize($query, 'json'), true)
-        );
-    }
-}
diff --git a/tests/src/Unit/ResponseTest.php b/tests/src/Unit/ResponseTest.php
index 68acc096..13af1320 100644
--- a/tests/src/Unit/ResponseTest.php
+++ b/tests/src/Unit/ResponseTest.php
@@ -27,32 +27,6 @@ public function testFromPsr7(): void
         $this->assertEquals('Who needs reasons?', $response->getStatusText());
     }
 
-    public function testGetSetStatus(): void
-    {
-        $response = (new \Deviantintegral\Har\Response())->setStatus(404);
-        $this->assertEquals(404, $response->getStatus());
-    }
-
-    public function testGetSetStatusText(): void
-    {
-        $response = (new \Deviantintegral\Har\Response())->setStatusText('Not Found');
-        $this->assertEquals('Not Found', $response->getStatusText());
-    }
-
-    public function testGetSetContent(): void
-    {
-        $content = (new Content())->setText('test content');
-        $response = (new \Deviantintegral\Har\Response())->setContent($content);
-        $this->assertSame($content, $response->getContent());
-    }
-
-    public function testGetSetRedirectURL(): void
-    {
-        $uri = new Uri('https://www.example.com/redirect');
-        $response = (new \Deviantintegral\Har\Response())->setRedirectURL($uri);
-        $this->assertSame($uri, $response->getRedirectURL());
-    }
-
     public function testSerialize(): void
     {
         $serializer = $this->getSerializer();
@@ -87,18 +61,6 @@ public function testSerialize(): void
         $this->assertEquals($response->getComment(), $deserialized->getComment());
     }
 
-    public function testSetHeadersCalculatesCorrectSize(): void
-    {
-        $response = new \Deviantintegral\Har\Response();
-
-        // Test with single header: "Content-Type: application/json"
-        // Size calculation: strlen("Content-Type") + 2 + strlen("application/json") + 2 = 12 + 2 + 16 + 2 = 32
-        // Plus final 2 for double CRLF: 32 + 2 = 34
-        $headers = [(new Header())->setName('Content-Type')->setValue('application/json')];
-        $response->setHeaders($headers);
-        $this->assertSame(34, $response->getHeadersSize());
-    }
-
     public function testSetHeadersWithMultipleHeaders(): void
     {
         $response = new \Deviantintegral\Har\Response();
@@ -124,15 +86,4 @@ public function testSetHeadersWithEmptyArray(): void
         $response->setHeaders([]);
         $this->assertSame(2, $response->getHeadersSize());
     }
-
-    public function testSetHeadersWithSingleCharacterValues(): void
-    {
-        $response = new \Deviantintegral\Har\Response();
-
-        // Test with minimal header to ensure each +2 is necessary
-        // "X: Y" = 1 + 2 + 1 + 2 = 6, plus final 2 = 8
-        $headers = [(new Header())->setName('X')->setValue('Y')];
-        $response->setHeaders($headers);
-        $this->assertSame(8, $response->getHeadersSize());
-    }
 }
diff --git a/tests/src/Unit/SharedFields/TextTraitTest.php b/tests/src/Unit/SharedFields/TextTraitTest.php
index fe5d932d..9cf17b5a 100644
--- a/tests/src/Unit/SharedFields/TextTraitTest.php
+++ b/tests/src/Unit/SharedFields/TextTraitTest.php
@@ -12,63 +12,10 @@
  */
 class TextTraitTest extends TestCase
 {
-    public function testSetTextIsPublic(): void
-    {
-        // This test kills the PublicVisibility mutation in TextTrait::setText
-        // by using a class that uses the trait WITHOUT aliasing/overriding.
-        //
-        // Unlike PostData and Content which alias setText as traitSetText
-        // and provide their own public setText, TextTraitTestClass uses
-        // the trait's method directly. If the trait's method becomes
-        // protected, this test will fail with a fatal error.
-        $instance = new TextTraitTestClass();
-
-        // Calling setText from outside the class - would fail if protected
-        $result = $instance->setText('test content');
-
-        // Verify method chaining works (returns self)
-        $this->assertSame($instance, $result);
-
-        // Verify the text was set
-        $this->assertTrue($instance->hasText());
-        $this->assertEquals('test content', $instance->getText());
-    }
-
-    public function testSetTextWithNull(): void
-    {
-        $instance = new TextTraitTestClass();
-        $instance->setText('initial');
-        $this->assertTrue($instance->hasText());
-
-        // Setting null should clear the text
-        $instance->setText(null);
-        $this->assertFalse($instance->hasText());
-        $this->assertNull($instance->getText());
-    }
-
-    public function testHasText(): void
-    {
-        $instance = new TextTraitTestClass();
-
-        // Initially no text
-        $this->assertFalse($instance->hasText());
-
-        // After setting text
-        $instance->setText('content');
-        $this->assertTrue($instance->hasText());
-
-        // After clearing text
-        $instance->setText(null);
-        $this->assertFalse($instance->hasText());
-    }
-
     public function testGetText(): void
     {
         $instance = new TextTraitTestClass();
 
-        // Initially null
-        $this->assertNull($instance->getText());
-
         // After setting
         $instance->setText('some text');
         $this->assertEquals('some text', $instance->getText());