diff --git a/includes/Helpers/Transient.php b/includes/Helpers/Transient.php
index 1124140..b92d2a1 100644
--- a/includes/Helpers/Transient.php
+++ b/includes/Helpers/Transient.php
@@ -34,18 +34,32 @@ public static function get( string $key ) {
 		}
 
 		/**
-		 * @var array{value:mixed, expires_at:int} $data The saved value and the Unix time it expires at.
+		 * Implement the filters as used in {@see get_transient()}.
+		 */
+		$pre = apply_filters( "pre_transient_{$key}", false, $key );
+		if ( false !== $pre ) {
+			return $pre;
+		}
+
+		/**
+		 * The saved value and the Unix time it expires at.
+		 *
+		 * @var array{value:mixed, expires_at:int} $data
 		 */
 		$data = \get_option( $key );
 		if ( is_array( $data ) && isset( $data['expires_at'], $data['value'] ) ) {
 			if ( $data['expires_at'] > time() ) {
-				return $data['value'];
+				$value = $data['value'];
 			} else {
 				\delete_option( $key );
+				$value = false;
 			}
 		}
 
-		return false;
+		/**
+		 * Implement the filters as used in {@see get_transient()}.
+		 */
+		return apply_filters( "transient_{$key}", $value, $key );
 	}
 
 	/**
@@ -65,11 +79,25 @@ public static function set( string $key, $value, int $expires_in = 3600 ): bool
 			return \set_transient( $key, $value, $expires_in );
 		}
 
+		/**
+		 * Implement the filters as used in {@see set_transient()}.
+		 */
+		$value      = apply_filters( "pre_set_transient_{$key}", $value, $expires_in, $key );
+		$expires_in = apply_filters( "expiration_of_transient_{$key}", $expires_in, $value, $key );
+
 		$data = array(
 			'value'      => $value,
 			'expires_at' => $expires_in + time(),
 		);
-		return \update_option( $key, $data, false );
+
+		$result = \update_option( $key, $data, false );
+
+		if ( $result ) {
+			do_action( "set_transient_{$key}", $value, $expires_in, $key );
+			do_action( 'setted_transient', $key, $value, $expires_in );
+		}
+
+		return $result;
 	}
 
 	/**
@@ -86,7 +114,26 @@ public static function delete( $key ): bool {
 			return \delete_transient( $key );
 		}
 
-		return \delete_option( $key );
+		/**
+		 * Implement the filters as used in {@see set_transient()}.
+		 *
+		 * @param string $key Transient name.
+		 */
+		do_action( "delete_transient_{$key}", $key );
+
+		$result = \delete_option( $key );
+
+		if ( $result ) {
+
+			/**
+			 * Implement the filters as used in {@see set_transient()}.
+			 *
+			 * @param string $transient Deleted transient name.
+			 */
+			do_action( 'deleted_transient', $key );
+		}
+
+		return $result;
 	}
 
 	/**
@@ -100,7 +147,7 @@ public static function delete( $key ): bool {
 	 */
 	public function __call( $name, $arguments ) {
 		if ( ! method_exists( __CLASS__, $name ) ) {
-			throw new \BadMethodCallException( "Method $name does not exist" );
+			throw new \BadMethodCallException( 'Method ' . esc_html( $name ) . ' does not exist' );
 		}
 		return self::$name( ...$arguments );
 	}
diff --git a/tests/phpunit/bootstrap.php b/tests/phpunit/bootstrap.php
index f39969f..a47486e 100644
--- a/tests/phpunit/bootstrap.php
+++ b/tests/phpunit/bootstrap.php
@@ -1,12 +1,5 @@
 <?php
 
-/**
- * I was having trouble with {@see WP_Mock::expectAction()} so mocked it here. Because we're using PHP 7.1, we're
- * not on the latest version of WP_Mock, which requires 7.4.
- */
-function do_action(...$args) {}
-function apply_filters(...$args) { return $args[1]; }
-
 /**
  * Resets mocks between each test case so the mocks in one do not unintentionally help pass another test.
  */
diff --git a/tests/phpunit/includes/Helpers/TransientTest.php b/tests/phpunit/includes/Helpers/TransientTest.php
index 06e7bb0..9049bbf 100644
--- a/tests/phpunit/includes/Helpers/TransientTest.php
+++ b/tests/phpunit/includes/Helpers/TransientTest.php
@@ -3,6 +3,7 @@
 namespace NewfoldLabs\WP\Module\Helpers;
 
 use NewfoldLabs\WP\Module\Data\Helpers\Transient;
+use WP_Mock;
 use WP_Mock\Tools\TestCase;
 
 /**
@@ -72,6 +73,20 @@ public function test_set_transient_use_options(): void {
 		\WP_Mock::userFunction( 'set_transient' )
 				->never();
 
+		WP_Mock::expectFilter(
+			"pre_set_transient_{$test_transient_name}",
+			'value',
+			999,
+			$test_transient_name
+		);
+
+		WP_Mock::expectFilter(
+			"expiration_of_transient_{$test_transient_name}",
+			999,
+			'value',
+			$test_transient_name,
+		);
+
 		\WP_Mock::userFunction( 'update_option' )
 				->once()
 				->with(
@@ -81,6 +96,20 @@ public function test_set_transient_use_options(): void {
 				)
 				->andReturnTrue();
 
+		WP_Mock::expectAction(
+			"set_transient_{$test_transient_name}",
+			'value',
+			999,
+			$test_transient_name
+		);
+
+		WP_Mock::expectAction(
+			'setted_transient',
+			$test_transient_name,
+			'value',
+			999
+		);
+
 		Transient::set( $test_transient_name, 'value', 999 );
 
 		$this->assertConditionsMet();
@@ -124,6 +153,12 @@ public function test_get_transient_use_options(): void {
 		\WP_Mock::userFunction( 'get_transient' )
 				->never();
 
+		WP_Mock::expectFilter(
+			"pre_transient_{$test_transient_name}",
+			false,
+			$test_transient_name
+		);
+
 		\WP_Mock::userFunction( 'get_option' )
 				->once()
 				->with( $test_transient_name, )
@@ -134,6 +169,12 @@ public function test_get_transient_use_options(): void {
 					)
 				);
 
+		WP_Mock::expectFilter(
+			"transient_{$test_transient_name}",
+			'value',
+			$test_transient_name
+		);
+
 		$result = Transient::get( $test_transient_name );
 
 		$this->assertEquals( 'value', $result );
@@ -153,6 +194,12 @@ public function test_get_transient_use_options_expired(): void {
 		\WP_Mock::userFunction( 'get_transient' )
 				->never();
 
+		WP_Mock::expectFilter(
+			"pre_transient_{$test_transient_name}",
+			false,
+			$test_transient_name
+		);
+
 		\WP_Mock::userFunction( 'get_option' )
 				->once()
 				->with( $test_transient_name, )
@@ -168,6 +215,12 @@ public function test_get_transient_use_options_expired(): void {
 				->with( $test_transient_name )
 				->andReturnTrue();
 
+		WP_Mock::expectFilter(
+			"transient_{$test_transient_name}",
+			false,
+			$test_transient_name
+		);
+
 		$result = Transient::get( $test_transient_name );
 
 		$this->assertFalse( $result );
@@ -205,22 +258,74 @@ public function test_should_use_transients_bluehost_cloud(): void {
 		$test_transient_name = uniqid( __FUNCTION__ );
 
 		\WP_Mock::userFunction( 'get_dropins' )
-		        ->once()
-		        ->andReturn( array( 'object-cache.php' => array() ) );
+				->once()
+				->andReturn( array( 'object-cache.php' => array() ) );
 
 		\WP_Mock::userFunction( 'set_transient' )
-		        ->once()
-		        ->with( $test_transient_name, 'value', 999 )
-		        ->andReturnTrue();
+				->once()
+				->with( $test_transient_name, 'value', 999 )
+				->andReturnTrue();
 
 		\WP_Mock::userFunction( 'update_option' )
-		        ->never();
+				->never();
 
 		\NewfoldLabs\WP\Context\setContext( 'platform', 'atomic' );
 
 		Transient::set( $test_transient_name, 'value', 999 );
 
 		$this->assertConditionsMet();
+	}
+
+	/**
+	 * {@see \WP_Mock\Functions::$wp_mocked_fuctions} array is not being reset between tests. The code seems to
+	 * have been refactored in WP_Mock's newer versions but we are stuck using PHP 7.3 for now.
+	 *
+	 * @runInSeparateProcess
+	 *
+	 * @covers ::set
+	 */
+	public function test_set_transient_filters_are_called(): void {
+
+		$test_transient_name = uniqid( __FUNCTION__ );
+
+		WP_Mock::userFunction( 'get_dropins' )
+				->once()
+				->andReturn( array( 'object-cache.php' => array() ) );
+
+		WP_Mock::expectFilter(
+			"pre_set_transient_{$test_transient_name}",
+			'value',
+			999,
+			$test_transient_name
+		);
 
+		WP_Mock::expectFilter(
+			"expiration_of_transient_{$test_transient_name}",
+			999,
+			'value',
+			$test_transient_name,
+		);
+
+		\WP_Mock::userFunction( 'update_option' )
+				->once()
+				->andReturn( true );
+
+		WP_Mock::expectAction(
+			"set_transient_{$test_transient_name}",
+			'value',
+			999,
+			$test_transient_name
+		);
+
+		WP_Mock::expectAction(
+			'setted_transient',
+			$test_transient_name,
+			'value',
+			999
+		);
+
+		Transient::set( $test_transient_name, 'value', 999 );
+
+		$this->assertConditionsMet();
 	}
 }
diff --git a/tests/phpunit/includes/HiiveConnectionTest.php b/tests/phpunit/includes/HiiveConnectionTest.php
index d1bfaa5..5541fa1 100644
--- a/tests/phpunit/includes/HiiveConnectionTest.php
+++ b/tests/phpunit/includes/HiiveConnectionTest.php
@@ -3,6 +3,7 @@
 namespace NewfoldLabs\WP\Module\Data;
 
 use Mockery;
+use NewfoldLabs\Container\Container;
 use NewfoldLabs\WP\Module\Data\Listeners\Plugin;
 use WP_Mock;
 use WP_Mock\Tools\TestCase;
@@ -16,6 +17,8 @@ class HiiveConnectionTest extends TestCase {
 	public function setUp(): void {
 		parent::setUp();
 
+		forceWpMockStrictModeOn();
+
 		WP_Mock::passthruFunction( '__' );
 		WP_Mock::passthruFunction( 'sanitize_title' );
 
@@ -39,7 +42,11 @@ function () {
 	 * @covers ::get_core_data
 	 */
 	public function test_plugin_sends_boxname_to_hiive(): void {
-		// WP_Mock::expectAction('newfold_container_set');
+		/**
+		 * Unable to get this working.
+		 */
+		forceWpMockStrictModeOff();
+		// WP_Mock::expectAction( 'newfold_container_set', \WP_Mock\Functions::type( Container::class ) );
 
 		$plugin        = Mockery::mock( Plugin::class );
 		$plugin->brand = 'bluehost';
@@ -48,11 +55,11 @@ public function test_plugin_sends_boxname_to_hiive(): void {
 		container()->set( 'plugin', $plugin );
 
 		WP_Mock::userFunction( 'get_option' )->once()->with( 'newfold_cache_level', 2 )->andReturn( 2 );
-		WP_Mock::userFunction( 'get_option' )->once()->with( 'newfold_cloudflare_enabled', false )->andReturn( false );
+		WP_Mock::userFunction( 'get_option' )->once()->with( 'newfold_cloudflare_enabled', false )->andReturnFalse();
 		WP_Mock::userFunction( 'get_option' )->once()->with( 'admin_email' )->andReturn( 'admin@example.com' );
 		WP_Mock::userFunction( 'get_site_url' )->once()->withNoArgs()->andReturn( 'http://example.com' );
 
-		// WP_Mock::expectFilter('newfold_wp_data_module_core_data_filter');
+		// WP_Mock::expectFilter( 'newfold_wp_data_module_core_data_filter', \WP_Mock\Functions::type( 'array' ) );
 
 		global $wpdb;
 		$wpdb = Mockery::mock();
@@ -64,11 +71,16 @@ public function test_plugin_sends_boxname_to_hiive(): void {
 
 		self::assertArrayHasKey( 'hostname', $result );
 	}
+
 	/**
 	 * @covers ::get_core_data
 	 */
 	public function test_plugin_sends_server_path_to_hiive(): void {
-		// WP_Mock::expectAction('newfold_container_set');
+		/**
+		 * Unable to get this working.
+		 */
+		forceWpMockStrictModeOff();
+		// WP_Mock::expectAction( 'newfold_container_set', \WP_Mock\Functions::type( Container::class ) );
 
 		$plugin        = Mockery::mock( Plugin::class );
 		$plugin->brand = 'bluehost';
@@ -81,7 +93,7 @@ public function test_plugin_sends_server_path_to_hiive(): void {
 		WP_Mock::userFunction( 'get_option' )->once()->with( 'admin_email' )->andReturn( 'admin@example.com' );
 		WP_Mock::userFunction( 'get_site_url' )->once()->withNoArgs()->andReturn( 'http://example.com' );
 
-		// WP_Mock::expectFilter('newfold_wp_data_module_core_data_filter');
+		// WP_Mock::expectFilter( 'newfold_wp_data_module_core_data_filter', \WP_Mock\Functions::type( 'array' ) );
 
 		global $wpdb;
 		$wpdb = Mockery::mock();
@@ -118,6 +130,12 @@ public function test_hiive_request_returns_wperror_when_no_auth_token(): void {
 			->once()
 			->andReturnNull();
 
+		/**
+		 * Unable to get this working.
+		 */
+		forceWpMockStrictModeOff();
+		// WP_Mock::expectAction('wp_error_added', \WP_Mock\Functions::type( 'string' ),\WP_Mock\Functions::type( 'string' ),\WP_Mock\Functions::type( 'string' ), \WP_Mock\Functions::type( 'WP_Error' ) );
+
 		$result = $sut->hiive_request( '/sites/v2/events' );
 
 		self::assertInstanceOf( \WP_Error::class, $result );
@@ -347,6 +365,12 @@ function ( string $constant_name ) use ( $temp_dir ) {
 				->twice()
 				->with( 'http_headers_useragent', array( $sut, 'add_plugin_name_version_to_user_agent' ) );
 
+		/**
+		 * Unable to get this working.
+		 */
+		forceWpMockStrictModeOff();
+		// WP_Mock::expectAction('wp_error_added', \WP_Mock\Functions::type( 'string' ),\WP_Mock\Functions::type( 'string' ),\WP_Mock\Functions::type( 'string' ), \WP_Mock\Functions::type( 'WP_Error' ) );
+
 		$sut->notify( array( $event ) );
 
 		$this->assertConditionsMet();
@@ -358,6 +382,7 @@ function ( string $constant_name ) use ( $temp_dir ) {
 	 * @covers ::get_auth_token
 	 */
 	public function test_fails_to_reconnect() {
+
 		$sut = Mockery::mock( HiiveConnection::class )->makePartial();
 
 		WP_Mock::expectFilterAdded( 'http_headers_useragent', array( $sut, 'add_plugin_name_version_to_user_agent' ), 10, 2 );
@@ -386,6 +411,12 @@ public function test_fails_to_reconnect() {
 				->once()
 				->andReturnFalse();
 
+		/**
+		 * Unable to get this working.
+		 */
+		forceWpMockStrictModeOff();
+		// WP_Mock::expectAction('wp_error_added', 'hiive_connection', 'This site is not connected to the hiive.', '', \WP_Mock\Functions::type( 'WP_Error' ) );
+
 		$sut->expects( 'reconnect' )->once()->andReturnFalse();
 
 		$result = $sut->hiive_request( 'sites/v2/events' );
diff --git a/tests/phpunit/includes/Listeners/CronTest.php b/tests/phpunit/includes/Listeners/CronTest.php
index 30cf2ef..b720dc2 100644
--- a/tests/phpunit/includes/Listeners/CronTest.php
+++ b/tests/phpunit/includes/Listeners/CronTest.php
@@ -85,7 +85,7 @@ public function test_cron_job_main_function(): void {
 		WP_Mock::userFunction('get_mu_plugins')
 			->once()->andReturn(array());
 
-		// WP_Mock::expectFilter('newfold_wp_data_module_cron_data_filter');
+		WP_Mock::expectFilter( 'newfold_wp_data_module_cron_data_filter', array( 'plugins' => array() ) );
 
 		$sut->shouldReceive('push')
 			->once()