diff --git a/test/ExceptionCaptureTest.php b/test/ExceptionCaptureTest.php
index 2d4dec0..4f64945 100644
--- a/test/ExceptionCaptureTest.php
+++ b/test/ExceptionCaptureTest.php
@@ -668,7 +668,6 @@ private function getProperty(string $property): mixed
     {
         $reflection = new \ReflectionClass(ExceptionCapture::class);
         $propertyReflection = $reflection->getProperty($property);
-        $propertyReflection->setAccessible(true);
 
         return $propertyReflection->getValue();
     }
diff --git a/test/ExceptionPayloadBuilderTest.php b/test/ExceptionPayloadBuilderTest.php
index 5e5b705..bc4253e 100644
--- a/test/ExceptionPayloadBuilderTest.php
+++ b/test/ExceptionPayloadBuilderTest.php
@@ -93,7 +93,6 @@ public function testInAppFalseForVendorFrames(): void
     {
         $reflector = new \ReflectionClass(ExceptionPayloadBuilder::class);
         $method    = $reflector->getMethod('buildFrame');
-        $method->setAccessible(true);
 
         $frame = $method->invoke(null, [
             'file'     => '/app/vendor/some/package/Foo.php',
@@ -108,7 +107,6 @@ public function testInAppTrueForAppFrames(): void
     {
         $reflector = new \ReflectionClass(ExceptionPayloadBuilder::class);
         $method    = $reflector->getMethod('buildFrame');
-        $method->setAccessible(true);
 
         $frame = $method->invoke(null, [
             'file'     => '/app/src/Services/MyService.php',
@@ -387,7 +385,6 @@ public function testFunctionIncludesClass(): void
     {
         $reflector = new \ReflectionClass(ExceptionPayloadBuilder::class);
         $method    = $reflector->getMethod('buildFrame');
-        $method->setAccessible(true);
 
         $frame = $method->invoke(null, [
             'file'     => '/app/src/Foo.php',
diff --git a/test/FeatureFlagErrorTest.php b/test/FeatureFlagErrorTest.php
index 8cc160c..bd543ee 100644
--- a/test/FeatureFlagErrorTest.php
+++ b/test/FeatureFlagErrorTest.php
@@ -5,6 +5,7 @@
 // comment out below to print all logs instead of failing tests
 require_once 'test/error_log_mock.php';
 
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 use PostHog\FeatureFlagError;
@@ -38,6 +39,7 @@ public function setUp($flagsEndpointResponse = MockedResponses::FLAGS_RESPONSE,
         $errorMessages = [];
     }
 
+    #[IgnoreDeprecations]
     public function testFlagMissingError()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -68,6 +70,7 @@ public function testFlagMissingError()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testErrorsWhileComputingFlagsError()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -101,6 +104,7 @@ public function testErrorsWhileComputingFlagsError()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testMultipleErrors()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -135,6 +139,7 @@ public function testMultipleErrors()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testNoErrorWhenFlagEvaluatesSuccessfully()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -162,6 +167,7 @@ public function testNoErrorWhenFlagEvaluatesSuccessfully()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testUnknownErrorWhenExceptionThrown()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -239,6 +245,7 @@ public function testApiErrorMethod()
         $this->assertEquals('api_error_429', FeatureFlagError::apiError(429));
     }
 
+    #[IgnoreDeprecations]
     public function testTimeoutError()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -285,6 +292,7 @@ public function testTimeoutError()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testConnectionError()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -331,6 +339,7 @@ public function testConnectionError()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testApiError500()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -376,6 +385,7 @@ public function testApiError500()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testQuotaLimitedError()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -424,6 +434,7 @@ public function testQuotaLimitedError()
         });
     }
 
+    #[IgnoreDeprecations]
     public function testFailedFlagIsFilteredOutByFailedField()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
diff --git a/test/FeatureFlagEvaluationsTest.php b/test/FeatureFlagEvaluationsTest.php
index 62d28f0..67d33a1 100644
--- a/test/FeatureFlagEvaluationsTest.php
+++ b/test/FeatureFlagEvaluationsTest.php
@@ -7,6 +7,7 @@
 require_once 'test/error_log_mock.php';
 
 use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 use PostHog\EvaluatedFlagRecord;
@@ -545,6 +546,7 @@ public function testLocalEvaluationResolvesPayloads(): void
     }
 
     #[DataProvider('falseFlagPayloadProvider')]
+    #[IgnoreDeprecations]
     public function testLocalFalseFlagResolvesPayload(mixed $rawPayload, mixed $expectedPayload): void
     {
         $this->makeClient(
@@ -884,9 +886,9 @@ public static function dedupCallsProvider(): array
     }
 
     /**
-     * @dataProvider dedupCallsProvider
      * @param list<array<string,string>> $groupsPerCall
      */
+    #[DataProvider('dedupCallsProvider')]
     public function testFeatureFlagCalledDedupes(array $groupsPerCall, int $expectedCount): void
     {
         $this->makeClient();
diff --git a/test/FeatureFlagLocalEvaluationTest.php b/test/FeatureFlagLocalEvaluationTest.php
index b9785a7..073875f 100644
--- a/test/FeatureFlagLocalEvaluationTest.php
+++ b/test/FeatureFlagLocalEvaluationTest.php
@@ -389,9 +389,7 @@ public function jsonSerialize(): mixed
         self::assertTrue(FeatureFlag::matchProperty($exact, ["key" => $jsonSerializable]));
     }
 
-    /**
-     * @dataProvider presentPresenceOperatorValuesProvider
-     */
+    #[DataProvider('presentPresenceOperatorValuesProvider')]
     public function testMatchPropertyPresenceOperatorsTreatPresentValuesAsSet($value): void
     {
         foreach (["is_set" => true, "is_not_set" => false] as $operator => $expected) {
@@ -1804,9 +1802,7 @@ public function testFlagGroupProperties()
         $this->assertEquals(PostHog::getFeatureFlag('group-flag', 'some-distinct-id', ["company" => "amazon"], [], ["company" => []]), 'decide-fallback-value');
     }
 
-    /**
-     * @dataProvider mixedTargetingProvider
-     */
+    #[DataProvider('mixedTargetingProvider')]
     public function testMixedTargetingLocalEvaluation(string $flagKey, array $opts, $expected, array $localFlags)
     {
         $this->http_client = new MockedHttpClient(host: "app.posthog.com", flagEndpointResponse: $localFlags);
@@ -5307,9 +5303,7 @@ private static function earlyExitFlag($earlyExit): array
         return ["key" => "early-exit-flag", "filters" => $filters];
     }
 
-    /**
-     * @dataProvider earlyExitRolloutExclusionProvider
-     */
+    #[DataProvider('earlyExitRolloutExclusionProvider')]
     public function testEarlyExitRolloutExclusion($earlyExit, bool $expected): void
     {
         $flag = self::earlyExitFlag($earlyExit);
diff --git a/test/FeatureFlagTest.php b/test/FeatureFlagTest.php
index f3312c3..f89e148 100644
--- a/test/FeatureFlagTest.php
+++ b/test/FeatureFlagTest.php
@@ -6,6 +6,8 @@
 require_once 'test/error_log_mock.php';
 
 use Exception;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 use PostHog\PostHog;
@@ -98,9 +100,7 @@ public static function retryableFlagsCurlErrors(): array
         ];
     }
 
-    /**
-     * @dataProvider retryableFlagsCurlErrors
-     */
+    #[DataProvider('retryableFlagsCurlErrors')]
     public function testFlagsRequestRetriesTransientCurlErrors(int $curlErrno): void
     {
         $this->http_client = new MockedHttpClient("app.posthog.com");
@@ -130,9 +130,7 @@ public function testFlagsRequestRetriesTransientCurlErrors(int $curlErrno): void
         }
     }
 
-    /**
-     * @dataProvider retryableFlagsCurlErrors
-     */
+    #[DataProvider('retryableFlagsCurlErrors')]
     public function testFlagsRequestStopsAfterExhaustingTransientCurlErrorRetries(int $curlErrno): void
     {
         $this->http_client = new MockedHttpClient("app.posthog.com");
@@ -212,9 +210,7 @@ public function testFlagsRequestDoesNotRetryConnectionRefused(): void
         $this->assertCount(1, $this->http_client->calls);
     }
 
-    /**
-     * @dataProvider nonRetryableFlagsStatusCodes
-     */
+    #[DataProvider('nonRetryableFlagsStatusCodes')]
     public function testFlagsRequestDoesNotRetryHttpStatusErrors(int $statusCode): void
     {
         $this->http_client = new MockedHttpClient("app.posthog.com");
@@ -241,9 +237,7 @@ public function testFlagsRequestDoesNotRetryHttpStatusErrors(int $statusCode): v
         $this->assertSame('/flags/?v=2', $this->http_client->calls[0]['path']);
     }
 
-    /**
-     * @dataProvider retryableFlagsStatusCodes
-     */
+    #[DataProvider('retryableFlagsStatusCodes')]
     public function testFlagsRequestRetriesHttp502And504(int $statusCode): void
     {
         $this->http_client = new MockedHttpClient("app.posthog.com");
@@ -271,9 +265,7 @@ public function testFlagsRequestRetriesHttp502And504(int $statusCode): void
         }
     }
 
-    /**
-     * @dataProvider retryableFlagsStatusCodes
-     */
+    #[DataProvider('retryableFlagsStatusCodes')]
     public function testFlagsRequestStopsAfterExhaustingHttp502And504Retries(int $statusCode): void
     {
         $this->http_client = new MockedHttpClient("app.posthog.com");
@@ -306,9 +298,7 @@ public function testFlagsRequestStopsAfterExhaustingHttp502And504Retries(int $st
         }
     }
 
-    /**
-     * @dataProvider retryableFlagsStatusCodes
-     */
+    #[DataProvider('retryableFlagsStatusCodes')]
     public function testFlagsRequestDoesNotRetryHttp502And504WhenConfiguredMaxRetriesIsZero(int $statusCode): void
     {
         $this->http_client = new MockedHttpClient("app.posthog.com");
@@ -335,9 +325,8 @@ public function testFlagsRequestDoesNotRetryHttp502And504WhenConfiguredMaxRetrie
         $this->assertCount(1, $this->http_client->calls);
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testIsFeatureEnabled($response)
     {
         $this->setUp($response);
@@ -361,6 +350,7 @@ public function testIsFeatureEnabled($response)
         );
     }
 
+    #[IgnoreDeprecations]
     public function testIsFeatureEnabledCapturesFeatureFlagCalledEventWithAdditionalMetadata()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -388,6 +378,7 @@ public function testIsFeatureEnabledCapturesFeatureFlagCalledEventWithAdditional
         });
     }
 
+    #[IgnoreDeprecations]
     public function testWhitespacePersonalApiKeyFallsBackToFlagsEndpoint()
     {
         $this->setUp(MockedResponses::FLAGS_V2_RESPONSE, personalApiKey: " \n\t ");
@@ -405,9 +396,8 @@ public function testWhitespacePersonalApiKeyFallsBackToFlagsEndpoint()
         );
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testIsFeatureEnabledGroups($response)
     {
         $this->setUp($response);
@@ -435,9 +425,8 @@ public function testIsFeatureEnabledGroups($response)
         );
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlag($response)
     {
         $this->setUp($response);
@@ -461,6 +450,7 @@ public function testGetFeatureFlag($response)
         );
     }
 
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagCapturesFeatureFlagCalledEventWithAdditionalMetadata()
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -499,9 +489,8 @@ public static function hasExperimentCases(): array
         ];
     }
 
-    /**
-     * @dataProvider hasExperimentCases
-     */
+    #[DataProvider('hasExperimentCases')]
+    #[IgnoreDeprecations]
     public function testFeatureFlagCalledEventIncludesHasExperimentFromRemoteMetadata(?bool $reported)
     {
         $response = MockedResponses::FLAGS_V2_RESPONSE;
@@ -523,6 +512,7 @@ public function testFeatureFlagCalledEventIncludesHasExperimentFromRemoteMetadat
         }
     }
 
+    #[IgnoreDeprecations]
     public function testMinimalFlagCalledEventKeepsOnlyAllowlistedProperties()
     {
         $response = MockedResponses::FLAGS_V2_RESPONSE;
@@ -553,6 +543,7 @@ public function testMinimalFlagCalledEventKeepsOnlyAllowlistedProperties()
         $this->assertSame($expected, $properties);
     }
 
+    #[IgnoreDeprecations]
     public function testMinimalFlagCalledEventKeepsSessionAttributionProperties()
     {
         $response = MockedResponses::FLAGS_V2_RESPONSE;
@@ -619,9 +610,8 @@ public static function fullFlagCalledEventCases(): array
         ];
     }
 
-    /**
-     * @dataProvider fullFlagCalledEventCases
-     */
+    #[DataProvider('fullFlagCalledEventCases')]
+    #[IgnoreDeprecations]
     public function testFlagCalledEventStaysFullWithoutBothMinimalSignals(bool $gated, ?bool $hasExperiment)
     {
         $response = MockedResponses::FLAGS_V2_RESPONSE;
@@ -642,9 +632,8 @@ public function testFlagCalledEventStaysFullWithoutBothMinimalSignals(bool $gate
         $this->assertSame('LibCurl', $properties['$lib_consumer']);
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagDefault($response)
     {
         $this->setUp($response);
@@ -653,9 +642,8 @@ public function testGetFeatureFlagDefault($response)
         $this->checkEmptyErrorLogs();
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagGroups($response)
     {
         $this->setUp($response);
@@ -686,9 +674,7 @@ public function testGetFeatureFlagGroups($response)
         );
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
     public function testfetchFeatureVariants($response)
     {
         $this->setUp($response);
@@ -698,9 +684,8 @@ public function testfetchFeatureVariants($response)
         $this->assertSame('variant-value', $flags['multivariate-test']);
     }
 
-     /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadHandlesJson($response): void
     {
         $this->setUp($response);
@@ -708,9 +693,8 @@ public function testGetFeatureFlagPayloadHandlesJson($response): void
         $this->assertSame(['key' => 'value'], PostHog::getFeatureFlagPayload('json-payload', 'some-distinct'));
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadHandlesIntegers($response): void
     {
         $this->setUp($response);
@@ -718,9 +702,8 @@ public function testGetFeatureFlagPayloadHandlesIntegers($response): void
         $this->assertSame(2500, PostHog::getFeatureFlagPayload('integer-payload', 'some-distinct'));
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadHandlesString($response): void
     {
         $this->setUp($response);
@@ -728,9 +711,8 @@ public function testGetFeatureFlagPayloadHandlesString($response): void
         $this->assertSame('A String', PostHog::getFeatureFlagPayload('string-payload', 'some-distinct'));
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadHandlesArray($response): void
     {
         $this->setUp($response);
@@ -738,9 +720,8 @@ public function testGetFeatureFlagPayloadHandlesArray($response): void
         $this->assertSame([1, 2, 3], PostHog::getFeatureFlagPayload('array-payload', 'some-distinct'));
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadHandlesFlagDisabled($response): void
     {
         $this->setUp($response);
@@ -748,9 +729,8 @@ public function testGetFeatureFlagPayloadHandlesFlagDisabled($response): void
         $this->assertNull(PostHog::getFeatureFlagPayload('disabled-flag', 'some-distinct'));
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadHandlesFlagNotInResults($response): void
     {
         $this->setUp($response);
@@ -758,9 +738,8 @@ public function testGetFeatureFlagPayloadHandlesFlagNotInResults($response): voi
         $this->assertNull(PostHog::getFeatureFlagPayload('non-existent-flag', 'some-distinct'));
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResult($response): void
     {
         $this->setUp($response);
@@ -775,9 +754,8 @@ public function testGetFeatureFlagResult($response): void
         $this->assertTrue($result->getValue());
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultWithMultivariateFlag($response): void
     {
         $this->setUp($response);
@@ -791,9 +769,8 @@ public function testGetFeatureFlagResultWithMultivariateFlag($response): void
         $this->assertEquals('variant-value', $result->getValue());
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultReturnsNullForMissingFlag($response): void
     {
         $this->setUp($response);
@@ -803,9 +780,8 @@ public function testGetFeatureFlagResultReturnsNullForMissingFlag($response): vo
         $this->assertNull($result);
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultForDisabledFlag($response): void
     {
         $this->setUp($response);
@@ -819,6 +795,7 @@ public function testGetFeatureFlagResultForDisabledFlag($response): void
         $this->assertFalse($result->getValue());
     }
 
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultSendsEvent(): void
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -850,9 +827,8 @@ public function testGetFeatureFlagResultSendsEvent(): void
         });
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultWithMultivariateFlagAndPayload($response): void
     {
         $this->setUp($response);
@@ -867,6 +843,7 @@ public function testGetFeatureFlagResultWithMultivariateFlagAndPayload($response
         $this->assertEquals('some string payload', $result->getPayload());
     }
 
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagPayloadDoesNotSendEvent(): void
     {
         $this->setUp(MockedResponses::FLAGS_V2_RESPONSE, personalApiKey: null);
@@ -887,9 +864,8 @@ public function testGetFeatureFlagPayloadDoesNotSendEvent(): void
         $this->assertNull($batchCall, 'Expected no batch call to be made for getFeatureFlagPayload');
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultForDisabledFlagWithPayload($response): void
     {
         $this->setUp($response);
@@ -904,6 +880,7 @@ public function testGetFeatureFlagResultForDisabledFlagWithPayload($response): v
         $this->assertEquals(['disabled' => true], $result->getPayload());
     }
 
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultWithLocalEvaluationOnly(): void
     {
         // For local evaluation, we need to set flagEndpointResponse (not flagsEndpointResponse)
@@ -939,6 +916,7 @@ public function testGetFeatureFlagResultWithLocalEvaluationOnly(): void
         }
     }
 
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultReturnsNullForLocalEvaluationWhenFlagCannotBeEvaluatedLocally(): void
     {
         // Use a flag config that requires cohorts which can't be evaluated locally
@@ -973,9 +951,8 @@ public function testGetFeatureFlagResultReturnsNullForLocalEvaluationWhenFlagCan
         }
     }
 
-    /**
-     * @dataProvider decideResponseCases
-     */
+    #[DataProvider('decideResponseCases')]
+    #[IgnoreDeprecations]
     public function testGetFeatureFlagResultWithGroups($response): void
     {
         $this->setUp($response);
diff --git a/test/FlagDefinitionCacheProviderTest.php b/test/FlagDefinitionCacheProviderTest.php
index 707d500..2ae8575 100644
--- a/test/FlagDefinitionCacheProviderTest.php
+++ b/test/FlagDefinitionCacheProviderTest.php
@@ -5,6 +5,7 @@
 require_once 'test/error_log_mock.php';
 
 use InvalidArgumentException;
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 use PostHog\FlagDefinitionCacheProvider;
@@ -505,6 +506,7 @@ public function testCamelCaseGroupTypeMappingIsAcceptedFromCache(): void
         $this->assertSame([], $httpClient->calls ?? []);
     }
 
+    #[IgnoreDeprecations]
     public function testMinimalFlagCalledGatePersistsThroughProviderCache(): void
     {
         $provider = new MockFlagDefinitionCacheProvider();
diff --git a/test/FlagDependencyIntegrationTest.php b/test/FlagDependencyIntegrationTest.php
index cdf3730..67b06f3 100644
--- a/test/FlagDependencyIntegrationTest.php
+++ b/test/FlagDependencyIntegrationTest.php
@@ -2,11 +2,13 @@
 
 namespace PostHog\Test;
 
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 
 class FlagDependencyIntegrationTest extends TestCase
 {
+    #[IgnoreDeprecations]
     public function testClientIntegrationWithFlagDependencies(): void
     {
         // Create a client with mock flags that have dependencies
diff --git a/test/FlagDependencyTest.php b/test/FlagDependencyTest.php
index e95ad5d..cad9528 100644
--- a/test/FlagDependencyTest.php
+++ b/test/FlagDependencyTest.php
@@ -2,6 +2,7 @@
 
 namespace PostHog\Test;
 
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 use PostHog\FeatureFlag;
@@ -426,6 +427,7 @@ public function testMatchesDependencyValue(): void
         $this->assertFalse(FeatureFlag::matchesDependencyValue("control", 123));
     }
 
+    #[IgnoreDeprecations]
     public function testProductionStyleMultivariateDependencyChain(): void
     {
         // Test production-style multivariate dependency chain:
diff --git a/test/GeoipTest.php b/test/GeoipTest.php
index 9543387..dd30dda 100644
--- a/test/GeoipTest.php
+++ b/test/GeoipTest.php
@@ -3,6 +3,7 @@
 namespace PostHog\Test;
 
 use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 use PostHog\PostHog;
@@ -107,6 +108,7 @@ public function testBeforeSendCanOverrideClientSettingAndExceptionInheritsIt():
     }
 
     #[DataProvider('geoipCases')]
+    #[IgnoreDeprecations]
     public function testCaptureFlagEnrichmentOptions(array $clientOptions, array $callOptions, bool $disabled): void
     {
         $http = new MockedHttpClient('app.posthog.com');
@@ -136,6 +138,7 @@ public function testMinimalExposurePreservesGeoipOption(): void
         $this->assertArrayNotHasKey('$lib_consumer', $event['properties']);
     }
 
+    #[IgnoreDeprecations]
     public function testLegacyFlagEvaluationInheritsClientOption(): void
     {
         $http = new MockedHttpClient('app.posthog.com');
diff --git a/test/MultivariateIntegrationTest.php b/test/MultivariateIntegrationTest.php
index 9207055..7591d57 100644
--- a/test/MultivariateIntegrationTest.php
+++ b/test/MultivariateIntegrationTest.php
@@ -2,11 +2,13 @@
 
 namespace PostHog\Test;
 
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use PostHog\Client;
 
 class MultivariateIntegrationTest extends TestCase
 {
+    #[IgnoreDeprecations]
     public function testMultivariateFlagDependencies(): void
     {
         // Create a client with mock multivariate flags that have dependencies
@@ -118,6 +120,7 @@ public function testMultivariateFlagDependencies(): void
         $this->assertTrue($foundOtherVariant, "Should have found at least one user that gets other variants");
     }
 
+    #[IgnoreDeprecations]
     public function testBooleanFlagDependencyOnMultivariate(): void
     {
         // Test a boolean flag that depends on any variant of a multivariate flag
diff --git a/test/PostHogTest.php b/test/PostHogTest.php
index 248a2b3..ce60eca 100644
--- a/test/PostHogTest.php
+++ b/test/PostHogTest.php
@@ -6,6 +6,8 @@
 require_once 'test/error_log_mock.php';
 
 use Exception;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\IgnoreDeprecations;
 use PHPUnit\Framework\TestCase;
 use RuntimeException;
 use PostHog\Client;
@@ -262,11 +264,8 @@ public function testClientTrimsWhitespaceSensitiveConfig(): void
 
         $ref = new \ReflectionClass($client);
         $apiKeyProp = $ref->getProperty('apiKey');
-        $apiKeyProp->setAccessible(true);
         $personalApiKeyProp = $ref->getProperty('personalAPIKey');
-        $personalApiKeyProp->setAccessible(true);
         $optionsProp = $ref->getProperty('options');
-        $optionsProp->setAccessible(true);
 
         $this->assertEquals('random_key', $apiKeyProp->getValue($client));
         $this->assertNull($personalApiKeyProp->getValue($client));
@@ -282,9 +281,7 @@ public static function secretKeyCredentialCases(): array
         ];
     }
 
-    /**
-     * @dataProvider secretKeyCredentialCases
-     */
+    #[DataProvider('secretKeyCredentialCases')]
     public function testSecretKeyResolution(?string $secretKey, ?string $personalApiKey, string $expected): void
     {
         $client = new Client(self::FAKE_API_KEY, [], $this->http_client, $personalApiKey, false, secretKey: $secretKey);
@@ -296,7 +293,6 @@ public function testSecretKeyResolution(?string $secretKey, ?string $personalApi
     private function readPrivate(Client $client, string $property): mixed
     {
         $prop = (new \ReflectionClass($client))->getProperty($property);
-        $prop->setAccessible(true);
 
         return $prop->getValue($client);
     }
@@ -319,17 +315,14 @@ public function testInitWithHttpHostSetsSslFalse(): void
         $client = PostHog::getClient();
         $ref = new \ReflectionClass($client);
         $consumerProp = $ref->getProperty('consumer');
-        $consumerProp->setAccessible(true);
         $consumer = $consumerProp->getValue($client);
 
         $cRef = new \ReflectionClass($consumer);
         $httpProp = $cRef->getProperty('httpClient');
-        $httpProp->setAccessible(true);
         $httpClient = $httpProp->getValue($consumer);
 
         $hRef = new \ReflectionClass($httpClient);
         $sslProp = $hRef->getProperty('useSsl');
-        $sslProp->setAccessible(true);
 
         $this->assertFalse($sslProp->getValue($httpClient), 'HttpClient should use ssl=false for http:// hosts');
     }
@@ -341,12 +334,10 @@ public function testInitDefaultsBlankHostAfterTrimmingWhitespace(): void
         $client = PostHog::getClient();
         $ref = new \ReflectionClass($client);
         $consumerProp = $ref->getProperty('consumer');
-        $consumerProp->setAccessible(true);
         $consumer = $consumerProp->getValue($client);
 
         $cRef = new \ReflectionClass($consumer);
         $hostProp = $cRef->getProperty('host');
-        $hostProp->setAccessible(true);
 
         $this->assertEquals('us.i.posthog.com', $hostProp->getValue($consumer));
     }
@@ -358,17 +349,14 @@ public function testInitWithWhitespacePaddedHttpHostSetsSslFalse(): void
         $client = PostHog::getClient();
         $ref = new \ReflectionClass($client);
         $consumerProp = $ref->getProperty('consumer');
-        $consumerProp->setAccessible(true);
         $consumer = $consumerProp->getValue($client);
 
         $cRef = new \ReflectionClass($consumer);
         $httpProp = $cRef->getProperty('httpClient');
-        $httpProp->setAccessible(true);
         $httpClient = $httpProp->getValue($consumer);
 
         $hRef = new \ReflectionClass($httpClient);
         $sslProp = $hRef->getProperty('useSsl');
-        $sslProp->setAccessible(true);
 
         $this->assertFalse($sslProp->getValue($httpClient), 'HttpClient should use ssl=false for whitespace-padded http:// hosts');
     }
@@ -380,17 +368,14 @@ public function testInitWithHttpsHostSetsSslTrue(): void
         $client = PostHog::getClient();
         $ref = new \ReflectionClass($client);
         $consumerProp = $ref->getProperty('consumer');
-        $consumerProp->setAccessible(true);
         $consumer = $consumerProp->getValue($client);
 
         $cRef = new \ReflectionClass($consumer);
         $httpProp = $cRef->getProperty('httpClient');
-        $httpProp->setAccessible(true);
         $httpClient = $httpProp->getValue($consumer);
 
         $hRef = new \ReflectionClass($httpClient);
         $sslProp = $hRef->getProperty('useSsl');
-        $sslProp->setAccessible(true);
 
         $this->assertTrue($sslProp->getValue($httpClient), 'HttpClient should use ssl=true for https:// hosts');
     }
@@ -403,17 +388,14 @@ public function testInitWithEnvHttpHostSetsSslFalse(): void
         $client = PostHog::getClient();
         $ref = new \ReflectionClass($client);
         $consumerProp = $ref->getProperty('consumer');
-        $consumerProp->setAccessible(true);
         $consumer = $consumerProp->getValue($client);
 
         $cRef = new \ReflectionClass($consumer);
         $httpProp = $cRef->getProperty('httpClient');
-        $httpProp->setAccessible(true);
         $httpClient = $httpProp->getValue($consumer);
 
         $hRef = new \ReflectionClass($httpClient);
         $sslProp = $hRef->getProperty('useSsl');
-        $sslProp->setAccessible(true);
 
         $this->assertFalse($sslProp->getValue($httpClient), 'HttpClient should use ssl=false for http:// env host');
 
@@ -434,9 +416,7 @@ public function testInitWithoutApiKeyConfiguresNoOpClient(): void
         });
     }
 
-    /**
-     * @dataProvider initNoOpApiKeyCases
-     */
+    #[DataProvider('initNoOpApiKeyCases')]
     public function testInitWithBlankApiKeyConfiguresNoOpClient(string $apiKey): void
     {
         $this->withEnvApiKey(null, function () use ($apiKey) {
@@ -459,16 +439,13 @@ public function testInitWithEmptyApiKeyFallsBackToEnvApiKey(): void
 
             $ref = new \ReflectionClass($client);
             $apiKeyProp = $ref->getProperty('apiKey');
-            $apiKeyProp->setAccessible(true);
 
             $this->assertSame(self::FAKE_API_KEY, $apiKeyProp->getValue($client));
             $this->assertNotInstanceOf(NoOp::class, $this->getConsumer($client));
         });
     }
 
-    /**
-     * @dataProvider disabledClientNoRequestCases
-     */
+    #[DataProvider('disabledClientNoRequestCases')]
     public function testClientWithBlankApiKeyDoesNotSendRequests(?string $apiKey, string $flagsMethod): void
     {
         $httpClient = new MockedHttpClient("app.posthog.com");
@@ -483,9 +460,7 @@ public function testClientWithBlankApiKeyDoesNotSendRequests(?string $apiKey, st
         $this->assertSame([], $httpClient->calls ?? []);
     }
 
-    /**
-     * @dataProvider queuedBatchSizeCases
-     */
+    #[DataProvider('queuedBatchSizeCases')]
     public function testCapturesStayQueuedUntilFlush(array $options): void
     {
         $httpClient = new MockedHttpClient("app.posthog.com");
@@ -660,9 +635,7 @@ public function testBeforeSendThrowingCallbackDropsEvent(): void
         $this->assertSame([], $httpClient->calls ?? []);
     }
 
-    /**
-     * @dataProvider invalidBeforeSendCases
-     */
+    #[DataProvider('invalidBeforeSendCases')]
     public function testBeforeSendInvalidCallbackPathsCaptureOriginalEvent(mixed $beforeSend): void
     {
         $httpClient = new MockedHttpClient("app.posthog.com");
@@ -691,9 +664,8 @@ public static function invalidBeforeSendCases(): iterable
     }
 
 
-    /**
-     * @dataProvider facadeNoOpBeforeInitCases
-     */
+    #[DataProvider('facadeNoOpBeforeInitCases')]
+    #[IgnoreDeprecations]
     public function testFacadeMethodsNoOpBeforeInit(callable $call, mixed $expectedValue): void
     {
         $this->unsetFacadeClient();
@@ -771,9 +743,7 @@ public function testCapture(): void
         );
     }
 
-    /**
-     * @dataProvider captureGroupsCases
-     */
+    #[DataProvider('captureGroupsCases')]
     public function testCaptureAddsGroupsProperty(string $groupsKey): void
     {
         self::assertTrue(
@@ -902,9 +872,7 @@ public static function invalidCaptureFlushIntervalCases(): array
         ];
     }
 
-    /**
-     * @dataProvider invalidCaptureFlushIntervalCases
-     */
+    #[DataProvider('invalidCaptureFlushIntervalCases')]
     public function testInvalidCaptureFlushIntervalDefaultsToFiveSeconds(mixed $flushInterval): void
     {
         $mockClock = new MockClock(new \DateTimeImmutable('2022-05-01 00:00:00'));
@@ -942,9 +910,7 @@ public function testInvalidCaptureFlushIntervalDefaultsToFiveSeconds(mixed $flus
         }
     }
 
-    /**
-     * @dataProvider validTopLevelUuidCases
-     */
+    #[DataProvider('validTopLevelUuidCases')]
     public function testCaptureKeepsValidTopLevelUuid(string $uuid): void
     {
         self::assertTrue(
@@ -963,9 +929,7 @@ public function testCaptureKeepsValidTopLevelUuid(string $uuid): void
         self::assertSame($uuid, $event['uuid']);
     }
 
-    /**
-     * @dataProvider invalidTopLevelUuidCases
-     */
+    #[DataProvider('invalidTopLevelUuidCases')]
     public function testCaptureReplacesInvalidTopLevelUuid(mixed $uuid): void
     {
         self::assertTrue(
@@ -985,9 +949,7 @@ public function testCaptureReplacesInvalidTopLevelUuid(mixed $uuid): void
         $this->assertValidUuidV4($event['uuid']);
     }
 
-    /**
-     * @dataProvider invalidTopLevelUuidCases
-     */
+    #[DataProvider('invalidTopLevelUuidCases')]
     public function testRawReplacesInvalidTopLevelUuid(mixed $uuid): void
     {
         $this->client->raw(
@@ -1153,6 +1115,7 @@ public function testCaptureOmitsIsServerPropertyWhenDisabled(): void
         self::assertArrayNotHasKey('$is_server', $properties);
     }
 
+    #[IgnoreDeprecations]
     public function testCaptureWithSendFeatureFlagsOption(): void
     {
         $this->executeAtFrozenDateTime(new \DateTime('2022-05-01'), function () {
@@ -1210,6 +1173,7 @@ public function testCaptureWithSendFeatureFlagsOption(): void
         });
     }
 
+    #[IgnoreDeprecations]
     public function testCaptureWithLocalSendFlags(): void
     {
         $this->http_client = new MockedHttpClient(host: "app.posthog.com", flagEndpointResponse: MockedResponses::LOCAL_EVALUATION_MULTIPLE_REQUEST);
@@ -1257,6 +1221,7 @@ public function testCaptureWithLocalSendFlags(): void
         });
     }
 
+    #[IgnoreDeprecations]
     public function testCaptureWithLocalSendFlagsNoOverrides(): void
     {
         $this->http_client = new MockedHttpClient(host: "app.posthog.com", flagEndpointResponse: MockedResponses::LOCAL_EVALUATION_MULTIPLE_REQUEST);
@@ -1617,6 +1582,7 @@ public function testGroupIdentifyValidation(): void
         PostHog::groupIdentify([]);
     }
 
+    #[IgnoreDeprecations]
     public function testDefaultPropertiesGetAddedProperly(): void
     {
         PostHog::getFeatureFlag('random_key', 'some_id', array("company" => "id:5", "instance" => "app.posthog.com"), array("x1" => "y1"), array("company" => array("x" => "y")));