diff --git a/tests/phpunit/tests/auth.php b/tests/phpunit/tests/auth.php
index c52b37db6d..de0a498b84 100644
--- a/tests/phpunit/tests/auth.php
+++ b/tests/phpunit/tests/auth.php
@@ -468,7 +468,7 @@ class Tests_Auth extends WP_UnitTestCase {
 			wp_validate_application_password( null ),
 			'Application passwords should be allowed for API authentication'
 		);
-		$this->assertEquals( $item['uuid'], rest_get_authenticated_app_password() );
+		$this->assertSame( $item['uuid'], rest_get_authenticated_app_password() );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/functions.php b/tests/phpunit/tests/functions.php
index 4f6a411694..f485d3b4ec 100644
--- a/tests/phpunit/tests/functions.php
+++ b/tests/phpunit/tests/functions.php
@@ -281,7 +281,7 @@ class Tests_Functions extends WP_UnitTestCase {
 			$callback_value = $property->getValue( $new_value );
 			$this->assertSame( null, $callback_value );
 		} else {
-			$this->assertEquals( $value->count(), unserialize( $serialized )->count() );
+			$this->assertSame( $value->count(), unserialize( $serialized )->count() );
 		}
 	}
 
diff --git a/tests/phpunit/tests/https-detection.php b/tests/phpunit/tests/https-detection.php
index 3fcd8bcbb9..70eeef51fd 100644
--- a/tests/phpunit/tests/https-detection.php
+++ b/tests/phpunit/tests/https-detection.php
@@ -65,14 +65,14 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 		// If initial request succeeds, all good.
 		add_filter( 'pre_http_request', array( $this, 'mock_success_with_sslverify' ), 10, 2 );
 		wp_update_https_detection_errors();
-		$this->assertEquals( array(), get_option( 'https_detection_errors' ) );
+		$this->assertSame( array(), get_option( 'https_detection_errors' ) );
 
 		// If initial request fails and request without SSL verification succeeds,
 		// return error with 'ssl_verification_failed' error code.
 		add_filter( 'pre_http_request', array( $this, 'mock_error_with_sslverify' ), 10, 2 );
 		add_filter( 'pre_http_request', array( $this, 'mock_success_without_sslverify' ), 10, 2 );
 		wp_update_https_detection_errors();
-		$this->assertEquals(
+		$this->assertSame(
 			array( 'ssl_verification_failed' => array( 'Bad SSL certificate.' ) ),
 			get_option( 'https_detection_errors' )
 		);
@@ -82,7 +82,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 		add_filter( 'pre_http_request', array( $this, 'mock_error_with_sslverify' ), 10, 2 );
 		add_filter( 'pre_http_request', array( $this, 'mock_error_without_sslverify' ), 10, 2 );
 		wp_update_https_detection_errors();
-		$this->assertEquals(
+		$this->assertSame(
 			array( 'bad_ssl_certificate' => array( 'Bad SSL certificate.' ) ),
 			get_option( 'https_detection_errors' )
 		);
@@ -91,7 +91,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 		// 'bad_response_code' error code.
 		add_filter( 'pre_http_request', array( $this, 'mock_not_found' ), 10, 2 );
 		wp_update_https_detection_errors();
-		$this->assertEquals(
+		$this->assertSame(
 			array( 'bad_response_code' => array( 'Not Found' ) ),
 			get_option( 'https_detection_errors' )
 		);
@@ -100,13 +100,13 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 		// WordPress site, return error with 'bad_response_source' error code.
 		add_filter( 'pre_http_request', array( $this, 'mock_bad_source' ), 10, 2 );
 		wp_update_https_detection_errors();
-		$this->assertEquals(
+		$this->assertSame(
 			array( 'bad_response_source' => array( 'It looks like the response did not come from this site.' ) ),
 			get_option( 'https_detection_errors' )
 		);
 
 		// Check that the requests are made to the correct URL.
-		$this->assertEquals( 'https://example.com/', $this->last_request_url );
+		$this->assertSame( 'https://example.com/', $this->last_request_url );
 	}
 
 	/**
@@ -121,7 +121,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 			}
 		);
 		wp_update_https_detection_errors();
-		$this->assertEquals( array(), get_option( 'https_detection_errors' ) );
+		$this->assertSame( array(), get_option( 'https_detection_errors' ) );
 
 		// Override to enforce an error being detected.
 		add_filter(
@@ -134,7 +134,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 			}
 		);
 		wp_update_https_detection_errors();
-		$this->assertEquals(
+		$this->assertSame(
 			array( 'ssl_verification_failed' => array( 'Bad SSL certificate.' ) ),
 			get_option( 'https_detection_errors' )
 		);
@@ -145,7 +145,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 	 */
 	public function test_wp_schedule_https_detection() {
 		wp_schedule_https_detection();
-		$this->assertEquals( 'twicedaily', wp_get_schedule( 'wp_https_detection' ) );
+		$this->assertSame( 'twicedaily', wp_get_schedule( 'wp_https_detection' ) );
 	}
 
 	/**
@@ -157,7 +157,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 			'url'  => 'http://example.com/',
 			'args' => array( 'sslverify' => true ),
 		);
-		$this->assertEquals( $request, wp_cron_conditionally_prevent_sslverify( $request ) );
+		$this->assertSame( $request, wp_cron_conditionally_prevent_sslverify( $request ) );
 
 		// If URL is using HTTPS, set 'sslverify' to false.
 		$request                       = array(
@@ -166,7 +166,7 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 		);
 		$expected                      = $request;
 		$expected['args']['sslverify'] = false;
-		$this->assertEquals( $expected, wp_cron_conditionally_prevent_sslverify( $request ) );
+		$this->assertSame( $expected, wp_cron_conditionally_prevent_sslverify( $request ) );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/https-migration.php b/tests/phpunit/tests/https-migration.php
index 6486f99bb3..dccf40b602 100644
--- a/tests/phpunit/tests/https-migration.php
+++ b/tests/phpunit/tests/https-migration.php
@@ -61,11 +61,11 @@ class Tests_HTTPS_Migration extends WP_UnitTestCase {
 
 		// Replaces URLs, including its encoded variant.
 		add_filter( 'wp_should_replace_insecure_home_url', '__return_true' );
-		$this->assertEquals( $https_content, wp_replace_insecure_home_url( $http_content ) );
+		$this->assertSame( $https_content, wp_replace_insecure_home_url( $http_content ) );
 
 		// Does not replace anything if determined as unnecessary.
 		add_filter( 'wp_should_replace_insecure_home_url', '__return_false' );
-		$this->assertEquals( $http_content, wp_replace_insecure_home_url( $http_content ) );
+		$this->assertSame( $http_content, wp_replace_insecure_home_url( $http_content ) );
 	}
 
 	/**
@@ -86,8 +86,8 @@ class Tests_HTTPS_Migration extends WP_UnitTestCase {
 
 		// Update URLs to HTTPS (successfully).
 		$this->assertTrue( wp_update_urls_to_https() );
-		$this->assertEquals( $https_url, get_option( 'home' ) );
-		$this->assertEquals( $https_url, get_option( 'siteurl' ) );
+		$this->assertSame( $https_url, get_option( 'home' ) );
+		$this->assertSame( $https_url, get_option( 'siteurl' ) );
 
 		// Switch options back to use HTTP URLs, but now add filter to
 		// force option value which will make the update irrelevant.
@@ -98,8 +98,8 @@ class Tests_HTTPS_Migration extends WP_UnitTestCase {
 		// Update URLs to HTTPS. While the update technically succeeds, it does not take effect due to the enforced
 		// option. Therefore the change is expected to be reverted.
 		$this->assertFalse( wp_update_urls_to_https() );
-		$this->assertEquals( $http_url, get_option( 'home' ) );
-		$this->assertEquals( $http_url, get_option( 'siteurl' ) );
+		$this->assertSame( $http_url, get_option( 'home' ) );
+		$this->assertSame( $http_url, get_option( 'siteurl' ) );
 	}
 
 	/**
@@ -109,7 +109,7 @@ class Tests_HTTPS_Migration extends WP_UnitTestCase {
 		// Changing HTTP to HTTPS on a site with content should result in flag being set, requiring migration.
 		update_option( 'fresh_site', '0' );
 		wp_update_https_migration_required( 'http://example.org', 'https://example.org' );
-		$this->assertEquals( '1', get_option( 'https_migration_required' ) );
+		$this->assertTrue( get_option( 'https_migration_required' ) );
 
 		// Changing another part than the scheme should delete/reset the flag because changing those parts (e.g. the
 		// domain) can have further implications.
@@ -119,7 +119,7 @@ class Tests_HTTPS_Migration extends WP_UnitTestCase {
 		// Changing HTTP to HTTPS on a site without content should result in flag being set, but not requiring migration.
 		update_option( 'fresh_site', '1' );
 		wp_update_https_migration_required( 'http://example.org', 'https://example.org' );
-		$this->assertEquals( '', get_option( 'https_migration_required' ) );
+		$this->assertFalse( get_option( 'https_migration_required' ) );
 
 		// Changing (back) from HTTPS to HTTP should delete/reset the flag.
 		wp_update_https_migration_required( 'https://example.org', 'http://example.org' );
diff --git a/tests/phpunit/tests/post.php b/tests/phpunit/tests/post.php
index 9c0b5a2e0a..2a3fb2a70b 100644
--- a/tests/phpunit/tests/post.php
+++ b/tests/phpunit/tests/post.php
@@ -1411,7 +1411,7 @@ class Tests_Post extends WP_UnitTestCase {
 		);
 		$post    = get_post( $post_id );
 		$this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $post->post_date ), 2, 'The dates should be equal' );
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 
 		$post_id = self::factory()->post->create(
 			array(
@@ -1421,7 +1421,7 @@ class Tests_Post extends WP_UnitTestCase {
 		);
 		$post    = get_post( $post_id );
 		$this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $post->post_date ), 2, 'The dates should be equal' );
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 
 		// Empty post_date_gmt without floating status
 		$post_id = self::factory()->post->create(
@@ -1450,8 +1450,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( get_date_from_gmt( $post_date_gmt ), $post->post_date );
-		$this->assertEquals( $post_date_gmt, $post->post_date_gmt );
+		$this->assertSame( get_date_from_gmt( $post_date_gmt ), $post->post_date );
+		$this->assertSame( $post_date_gmt, $post->post_date_gmt );
 
 		// Invalid post_date_gmt
 		$post_id = self::factory()->post->create(
@@ -1460,8 +1460,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( '1970-01-01 00:00:00', $post->post_date );
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( '1970-01-01 00:00:00', $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 	}
 
 	/**
@@ -1480,8 +1480,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( $post_date, $post->post_date );
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 
 		$post_id = self::factory()->post->create(
 			array(
@@ -1491,8 +1491,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( $post_date, $post->post_date );
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 
 		// Empty post_date_gmt without floating status
 		$post_id = self::factory()->post->create(
@@ -1502,8 +1502,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( $post_date, $post->post_date );
-		$this->assertEquals( get_gmt_from_date( $post_date ), $post->post_date_gmt );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( get_gmt_from_date( $post_date ), $post->post_date_gmt );
 
 		$post_id = self::factory()->post->create(
 			array(
@@ -1513,8 +1513,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( $post_date, $post->post_date );
-		$this->assertEquals( get_gmt_from_date( $post_date ), $post->post_date_gmt );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( get_gmt_from_date( $post_date ), $post->post_date_gmt );
 
 		// Valid post_date_gmt
 		$post_id = self::factory()->post->create(
@@ -1524,8 +1524,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( $post_date, $post->post_date );
-		$this->assertEquals( $post_date_gmt, $post->post_date_gmt );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( $post_date_gmt, $post->post_date_gmt );
 
 		// Invalid post_date_gmt
 		$post_id = self::factory()->post->create(
@@ -1535,8 +1535,8 @@ class Tests_Post extends WP_UnitTestCase {
 			)
 		);
 		$post    = get_post( $post_id );
-		$this->assertEquals( $post_date, $post->post_date );
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 	}
 
 	/**
@@ -1554,7 +1554,7 @@ class Tests_Post extends WP_UnitTestCase {
 				'post_status' => 'draft',
 			)
 		);
-		$this->assertEquals( 0, $post_id );
+		$this->assertSame( 0, $post_id );
 
 		$post_id = self::factory()->post->create(
 			array(
@@ -1563,7 +1563,7 @@ class Tests_Post extends WP_UnitTestCase {
 				'post_status'   => 'draft',
 			)
 		);
-		$this->assertEquals( 0, $post_id );
+		$this->assertSame( 0, $post_id );
 
 		// Empty post_date_gmt without floating status
 		$post_id = self::factory()->post->create(
@@ -1572,7 +1572,7 @@ class Tests_Post extends WP_UnitTestCase {
 				'post_status' => 'publish',
 			)
 		);
-		$this->assertEquals( 0, $post_id );
+		$this->assertSame( 0, $post_id );
 
 		$post_id = self::factory()->post->create(
 			array(
@@ -1581,7 +1581,7 @@ class Tests_Post extends WP_UnitTestCase {
 				'post_status'   => 'publish',
 			)
 		);
-		$this->assertEquals( 0, $post_id );
+		$this->assertSame( 0, $post_id );
 
 		// Valid post_date_gmt
 		$post_id = self::factory()->post->create(
@@ -1590,7 +1590,7 @@ class Tests_Post extends WP_UnitTestCase {
 				'post_date_gmt' => $post_date_gmt,
 			)
 		);
-		$this->assertEquals( 0, $post_id );
+		$this->assertSame( 0, $post_id );
 
 		// Invalid post_date_gmt
 		$post_id = self::factory()->post->create(
@@ -1599,7 +1599,7 @@ class Tests_Post extends WP_UnitTestCase {
 				'post_date_gmt' => $invalid_date,
 			)
 		);
-		$this->assertEquals( 0, $post_id );
+		$this->assertSame( 0, $post_id );
 	}
 
 	/**
@@ -1614,19 +1614,19 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $resolved_post_date ), 2, 'The dates should be equal' );
 
 		$resolved_post_date = wp_resolve_post_date( '', $post_date_gmt );
-		$this->assertEquals( get_date_from_gmt( $post_date_gmt ), $resolved_post_date );
+		$this->assertSame( get_date_from_gmt( $post_date_gmt ), $resolved_post_date );
 
 		$resolved_post_date = wp_resolve_post_date( '', $invalid_date );
-		$this->assertEquals( '1970-01-01 00:00:00', $resolved_post_date );
+		$this->assertSame( '1970-01-01 00:00:00', $resolved_post_date );
 
 		$resolved_post_date = wp_resolve_post_date( $post_date );
-		$this->assertEquals( $post_date, $resolved_post_date );
+		$this->assertSame( $post_date, $resolved_post_date );
 
 		$resolved_post_date = wp_resolve_post_date( $post_date, $post_date_gmt );
-		$this->assertEquals( $post_date, $resolved_post_date );
+		$this->assertSame( $post_date, $resolved_post_date );
 
 		$resolved_post_date = wp_resolve_post_date( $post_date, $invalid_date );
-		$this->assertEquals( $post_date, $resolved_post_date );
+		$this->assertSame( $post_date, $resolved_post_date );
 
 		$resolved_post_date = wp_resolve_post_date( $invalid_date );
 		$this->assertFalse( $resolved_post_date );
diff --git a/tests/phpunit/tests/post/nav-menu.php b/tests/phpunit/tests/post/nav-menu.php
index 075138618a..3f82ed999c 100644
--- a/tests/phpunit/tests/post/nav-menu.php
+++ b/tests/phpunit/tests/post/nav-menu.php
@@ -1037,7 +1037,7 @@ class Tests_Post_Nav_Menu extends WP_UnitTestCase {
 			)
 		);
 		$post         = get_post( $menu_item_id );
-		$this->assertEquals( get_date_from_gmt( $post_date_gmt ), $post->post_date );
+		$this->assertSame( get_date_from_gmt( $post_date_gmt ), $post->post_date );
 
 		$menu_item_id = wp_update_nav_menu_item(
 			$this->menu_id,
@@ -1051,7 +1051,7 @@ class Tests_Post_Nav_Menu extends WP_UnitTestCase {
 			)
 		);
 		$post         = get_post( $menu_item_id );
-		$this->assertEquals( '1970-01-01 00:00:00', $post->post_date );
+		$this->assertSame( '1970-01-01 00:00:00', $post->post_date );
 
 		$menu_item_id = wp_update_nav_menu_item(
 			$this->menu_id,
@@ -1065,7 +1065,7 @@ class Tests_Post_Nav_Menu extends WP_UnitTestCase {
 			)
 		);
 		$post         = get_post( $menu_item_id );
-		$this->assertEquals( $post_date, $post->post_date );
+		$this->assertSame( $post_date, $post->post_date );
 
 		$menu_item_id = wp_update_nav_menu_item(
 			$this->menu_id,
@@ -1080,7 +1080,7 @@ class Tests_Post_Nav_Menu extends WP_UnitTestCase {
 			)
 		);
 		$post         = get_post( $menu_item_id );
-		$this->assertEquals( $post_date, $post->post_date );
+		$this->assertSame( $post_date, $post->post_date );
 
 		$menu_item_id = wp_update_nav_menu_item(
 			$this->menu_id,
@@ -1095,7 +1095,7 @@ class Tests_Post_Nav_Menu extends WP_UnitTestCase {
 			)
 		);
 		$post         = get_post( $menu_item_id );
-		$this->assertEquals( $post_date, $post->post_date );
+		$this->assertSame( $post_date, $post->post_date );
 
 		$menu_item_id = wp_update_nav_menu_item(
 			$this->menu_id,
diff --git a/tests/phpunit/tests/rest-api/rest-application-passwords-controller.php b/tests/phpunit/tests/rest-api/rest-application-passwords-controller.php
index b55c8e082d..4b819426d6 100644
--- a/tests/phpunit/tests/rest-api/rest-application-passwords-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-application-passwords-controller.php
@@ -891,7 +891,7 @@ class WP_Test_REST_Application_Passwords_Controller extends WP_Test_REST_Control
 		$response = rest_do_request( '/wp/v2/users/me/application-passwords/introspect' );
 		$this->assertNotWPError( $response->as_error() );
 
-		$this->assertEquals( $password['uuid'], $response->get_data()['uuid'] );
+		$this->assertSame( $password['uuid'], $response->get_data()['uuid'] );
 	}
 
 	/**
@@ -901,7 +901,7 @@ class WP_Test_REST_Application_Passwords_Controller extends WP_Test_REST_Control
 		$password = $this->setup_app_password_authenticated_request();
 		$response = rest_do_request( '/wp/v2/users/' . self::$admin . '/application-passwords/introspect' );
 
-		$this->assertEquals( $password['uuid'], $response->get_data()['uuid'] );
+		$this->assertSame( $password['uuid'], $response->get_data()['uuid'] );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/rest-api/rest-posts-controller.php b/tests/phpunit/tests/rest-api/rest-posts-controller.php
index 39d1d77e9a..2d0e1767d0 100644
--- a/tests/phpunit/tests/rest-api/rest-posts-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-posts-controller.php
@@ -1199,7 +1199,7 @@ class WP_Test_REST_Posts_Controller extends WP_Test_REST_Post_Type_Controller_Te
 		$data     = $response->get_data();
 
 		$this->assertCount( 1, $data );
-		$this->assertEquals( $post_ids[0], $data[0]['id'] );
+		$this->assertSame( $post_ids[0], $data[0]['id'] );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/rest-api/rest-request.php b/tests/phpunit/tests/rest-api/rest-request.php
index 54afd39c7c..3502778972 100644
--- a/tests/phpunit/tests/rest-api/rest-request.php
+++ b/tests/phpunit/tests/rest-api/rest-request.php
@@ -494,7 +494,7 @@ class Tests_REST_Request extends WP_UnitTestCase {
 		$this->assertInternalType( 'array', $data );
 		$this->assertArrayHasKey( 'params', $data );
 		$this->assertArrayHasKey( 'failparam', $data['params'] );
-		$this->assertEquals( 'Invalid. Super Invalid. Broken.', $data['params']['failparam'] );
+		$this->assertSame( 'Invalid. Super Invalid. Broken.', $data['params']['failparam'] );
 	}
 
 	/**
@@ -524,7 +524,7 @@ class Tests_REST_Request extends WP_UnitTestCase {
 		$data = $valid->get_error_data();
 		$this->assertArrayHasKey( 'details', $data );
 		$this->assertArrayHasKey( 'failparam', $data['details'] );
-		$this->assertEquals(
+		$this->assertSame(
 			array(
 				'code'    => 'invalid',
 				'message' => 'Invalid.',
@@ -757,7 +757,7 @@ class Tests_REST_Request extends WP_UnitTestCase {
 		$this->assertInternalType( 'array', $data );
 		$this->assertArrayHasKey( 'params', $data );
 		$this->assertArrayHasKey( 'failparam', $data['params'] );
-		$this->assertEquals( 'Invalid. Super Invalid. Broken.', $data['params']['failparam'] );
+		$this->assertSame( 'Invalid. Super Invalid. Broken.', $data['params']['failparam'] );
 	}
 
 	/**
@@ -787,7 +787,7 @@ class Tests_REST_Request extends WP_UnitTestCase {
 		$data = $valid->get_error_data();
 		$this->assertArrayHasKey( 'details', $data );
 		$this->assertArrayHasKey( 'failparam', $data['details'] );
-		$this->assertEquals(
+		$this->assertSame(
 			array(
 				'code'    => 'invalid',
 				'message' => 'Invalid.',
diff --git a/tests/phpunit/tests/rest-api/rest-server.php b/tests/phpunit/tests/rest-api/rest-server.php
index b47cacd245..0dbc308bf9 100644
--- a/tests/phpunit/tests/rest-api/rest-server.php
+++ b/tests/phpunit/tests/rest-api/rest-server.php
@@ -465,8 +465,8 @@ class Tests_REST_Server extends WP_Test_REST_TestCase {
 
 		$response = rest_convert_error_to_response( $error );
 		$this->assertSame( 400, $response->get_status() );
-		$this->assertEquals( 'more_data', $response->get_data()['data'] );
-		$this->assertEquals( array( array( 'status' => 400 ) ), $response->get_data()['additional_data'] );
+		$this->assertSame( 'more_data', $response->get_data()['data'] );
+		$this->assertSame( array( array( 'status' => 400 ) ), $response->get_data()['additional_data'] );
 	}
 
 	public function test_rest_error() {
diff --git a/tests/phpunit/tests/rest-api/rest-themes-controller.php b/tests/phpunit/tests/rest-api/rest-themes-controller.php
index 86b3481c94..25265ca6fe 100644
--- a/tests/phpunit/tests/rest-api/rest-themes-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-themes-controller.php
@@ -199,7 +199,7 @@ class WP_Test_REST_Themes_Controller extends WP_Test_REST_Controller_Testcase {
 
 		$response = rest_get_server()->dispatch( $request );
 
-		$this->assertEquals( 200, $response->get_status() );
+		$this->assertSame( 200, $response->get_status() );
 		$data = $response->get_data();
 
 		$fields = array(
@@ -237,7 +237,7 @@ class WP_Test_REST_Themes_Controller extends WP_Test_REST_Controller_Testcase {
 
 		$response = rest_get_server()->dispatch( $request );
 
-		$this->assertEquals( 200, $response->get_status() );
+		$this->assertSame( 200, $response->get_status() );
 		$data = $response->get_data();
 
 		$this->assertContains( 'twentytwenty', wp_list_pluck( $data, 'stylesheet' ) );
@@ -297,7 +297,7 @@ class WP_Test_REST_Themes_Controller extends WP_Test_REST_Controller_Testcase {
 		if ( $error_code ) {
 			$this->assertErrorResponse( $error_code, $response, 403 );
 		} else {
-			$this->assertEquals( 200, $response->get_status() );
+			$this->assertSame( 200, $response->get_status() );
 		}
 	}
 
@@ -1215,7 +1215,7 @@ class WP_Test_REST_Themes_Controller extends WP_Test_REST_Controller_Testcase {
 		$request  = new WP_REST_Request( 'GET', $route );
 		$response = rest_get_server()->dispatch( $request );
 
-		$this->assertEquals( 200, $response->get_status() );
+		$this->assertSame( 200, $response->get_status() );
 		$data         = $response->get_data();
 		$links        = $response->get_links();
 		$fields       = array(
@@ -1278,7 +1278,7 @@ class WP_Test_REST_Themes_Controller extends WP_Test_REST_Controller_Testcase {
 		$request  = new WP_REST_Request( 'GET', $route );
 		$response = rest_get_server()->dispatch( $request );
 
-		$this->assertEquals( 200, $response->get_status() );
+		$this->assertSame( 200, $response->get_status() );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/robots.php b/tests/phpunit/tests/robots.php
index 8eb83281ec..a8073b36f3 100644
--- a/tests/phpunit/tests/robots.php
+++ b/tests/phpunit/tests/robots.php
@@ -29,7 +29,7 @@ class Tests_Robots extends WP_UnitTestCase {
 		// Render robots meta tag with noindex.
 		add_filter( 'wp_robots', array( $this, 'add_noindex_directive' ) );
 		$output = get_echo( 'wp_robots' );
-		$this->assertEquals( "<meta name='robots' content='noindex' />\n", $output );
+		$this->assertSame( "<meta name='robots' content='noindex' />\n", $output );
 
 		// Do not render robots meta tag when there are only false-y directives.
 		add_filter( 'wp_robots', array( $this, 'remove_noindex_directive' ), 11 );