diff --git a/tests/phpunit/tests/ajax/wpAjaxImageEditor.php b/tests/phpunit/tests/ajax/wpAjaxImageEditor.php
index ac761c3520..89745d6458 100644
--- a/tests/phpunit/tests/ajax/wpAjaxImageEditor.php
+++ b/tests/phpunit/tests/ajax/wpAjaxImageEditor.php
@@ -52,7 +52,7 @@ class Tests_Ajax_wpAjaxImageEditor extends WP_Ajax_UnitTestCase {
 		$ret = wp_save_image( $id );
 
 		$this->assertObjectHasProperty( 'error', $ret );
-		$this->assertEquals( 'Images cannot be scaled to a size larger than the original.', $ret->error );
+		$this->assertSame( 'Images cannot be scaled to a size larger than the original.', $ret->error );
 	}
 
 	/**
diff --git a/tests/phpunit/tests/ajax/wpAjaxInlineSave.php b/tests/phpunit/tests/ajax/wpAjaxInlineSave.php
index 2edd630de8..afb73e6dcf 100644
--- a/tests/phpunit/tests/ajax/wpAjaxInlineSave.php
+++ b/tests/phpunit/tests/ajax/wpAjaxInlineSave.php
@@ -110,7 +110,7 @@ class Tests_Ajax_wpAjaxInlineSave extends WP_Ajax_UnitTestCase {
 
 		$this->assertSame( 'draft', $post->post_status );
 
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 
 		// Set up a request.
 		$_POST['_inline_edit'] = wp_create_nonce( 'inlineeditnonce' );
@@ -142,7 +142,7 @@ class Tests_Ajax_wpAjaxInlineSave extends WP_Ajax_UnitTestCase {
 
 		$post_date = sprintf( '%04d-%02d-%02d %02d:%02d:%02d', $_POST['aa'], $_POST['mm'], $_POST['jj'], $_POST['hh'], $_POST['mn'], $_POST['ss'] );
 
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 	}
 
 	/**
@@ -167,7 +167,7 @@ class Tests_Ajax_wpAjaxInlineSave extends WP_Ajax_UnitTestCase {
 
 		$this->assertSame( 'draft', $post->post_status );
 
-		$this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
 
 		// Set up a request.
 		$_POST['_inline_edit'] = wp_create_nonce( 'inlineeditnonce' );
@@ -197,6 +197,6 @@ class Tests_Ajax_wpAjaxInlineSave extends WP_Ajax_UnitTestCase {
 
 		$post = get_post( $post->ID );
 
-		$this->assertEquals( '2020-09-11 19:20:11', $post->post_date_gmt );
+		$this->assertSame( '2020-09-11 19:20:11', $post->post_date_gmt );
 	}
 }
diff --git a/tests/phpunit/tests/dependencies/scripts.php b/tests/phpunit/tests/dependencies/scripts.php
index 9021397e3b..2280771880 100644
--- a/tests/phpunit/tests/dependencies/scripts.php
+++ b/tests/phpunit/tests/dependencies/scripts.php
@@ -3366,7 +3366,7 @@ HTML
 
 		wp_default_packages_vendor( $wp_scripts );
 
-		$this->assertEquals( $package_json[ $script ], $wp_scripts->query( $script, 'registered' )->ver );
+		$this->assertSame( $package_json[ $script ], $wp_scripts->query( $script, 'registered' )->ver );
 	}
 
 	public function data_wp_default_packages_vendor() {
diff --git a/tests/phpunit/tests/html-api/wpHtmlProcessorSemanticRules.php b/tests/phpunit/tests/html-api/wpHtmlProcessorSemanticRules.php
index 7bd243d8dc..bd3996d51d 100644
--- a/tests/phpunit/tests/html-api/wpHtmlProcessorSemanticRules.php
+++ b/tests/phpunit/tests/html-api/wpHtmlProcessorSemanticRules.php
@@ -35,7 +35,7 @@ class Tests_HtmlApi_WpHtmlProcessorSemanticRules extends WP_UnitTestCase {
 			continue;
 		}
 
-		$this->assertEquals(
+		$this->assertSame(
 			$tag_name,
 			$processor->get_tag(),
 			"Expected to find {$tag_name} but found {$processor->get_tag()} instead."
@@ -125,7 +125,7 @@ class Tests_HtmlApi_WpHtmlProcessorSemanticRules extends WP_UnitTestCase {
 		$p = WP_HTML_Processor::create_fragment( '<div>Test</button></div>' );
 
 		$p->step();
-		$this->assertEquals( 'DIV', $p->get_tag(), 'Did not stop at initial DIV tag.' );
+		$this->assertSame( 'DIV', $p->get_tag(), 'Did not stop at initial DIV tag.' );
 		$this->assertFalse( $p->is_tag_closer(), 'Did not find that initial DIV tag is an opener.' );
 
 		/*
@@ -133,7 +133,7 @@ class Tests_HtmlApi_WpHtmlProcessorSemanticRules extends WP_UnitTestCase {
 		 * It should be ignored as there's no BUTTON to close.
 		 */
 		$this->assertTrue( $p->step(), 'Found no further tags when it should have found the closing DIV' );
-		$this->assertEquals( 'DIV', $p->get_tag(), "Did not skip unexpected BUTTON; stopped at {$p->get_tag()}." );
+		$this->assertSame( 'DIV', $p->get_tag(), "Did not skip unexpected BUTTON; stopped at {$p->get_tag()}." );
 		$this->assertTrue( $p->is_tag_closer(), 'Did not find that the terminal DIV tag is a closer.' );
 	}
 
diff --git a/tests/phpunit/tests/theme.php b/tests/phpunit/tests/theme.php
index cf5ea9ad6c..a70bf9e7ff 100644
--- a/tests/phpunit/tests/theme.php
+++ b/tests/phpunit/tests/theme.php
@@ -1259,8 +1259,8 @@ class Tests_Theme extends WP_UnitTestCase {
 		// Cleanup.
 		switch_theme( $old_theme->get_stylesheet() );
 
-		$this->assertEquals( $old_root . '/test', $path1, 'The original stylesheet path is not correct' );
-		$this->assertEquals( $new_root . '/test', $path2, 'The new stylesheet path is not correct' );
+		$this->assertSame( $old_root . '/test', $path1, 'The original stylesheet path is not correct' );
+		$this->assertSame( $new_root . '/test', $path2, 'The new stylesheet path is not correct' );
 	}
 
 	/**
@@ -1302,7 +1302,7 @@ class Tests_Theme extends WP_UnitTestCase {
 		// Cleanup.
 		switch_theme( $old_theme->get_stylesheet() );
 
-		$this->assertEquals( $old_root . '/test-parent', $path1, 'The original template path is not correct' );
-		$this->assertEquals( $new_root . '/test-parent', $path2, 'The new template path is not correct' );
+		$this->assertSame( $old_root . '/test-parent', $path1, 'The original template path is not correct' );
+		$this->assertSame( $new_root . '/test-parent', $path2, 'The new template path is not correct' );
 	}
 }