diff --git a/tests/phpunit/tests/customize/widgets.php b/tests/phpunit/tests/customize/widgets.php
index 5b64f85ce3392..c2ed6dbc661e2 100644
--- a/tests/phpunit/tests/customize/widgets.php
+++ b/tests/phpunit/tests/customize/widgets.php
@@ -397,8 +397,8 @@ public function test_get_setting_args() {
 		foreach ( $default_args as $key => $default_value ) {
 			$this->assertSame( $default_value, $args[ $key ] );
 		}
-		$this->assertTrue( is_callable( $args['sanitize_callback'] ), 'sanitize_callback is callable' );
-		$this->asserttrue( is_callable( $args['sanitize_js_callback'] ), 'sanitize_js_callback is callable' );
+		$this->assertIsCallable( $args['sanitize_callback'], 'sanitize_callback is callable' );
+		$this->assertIsCallable( $args['sanitize_js_callback'], 'sanitize_js_callback is callable' );
 		$this->assertSame( 'WIDGET_FOO[2]', $args['uppercase_id_set_by_filter'] );
 
 		$default_args = array(
@@ -411,8 +411,8 @@ public function test_get_setting_args() {
 		foreach ( $default_args as $key => $default_value ) {
 			$this->assertSame( $default_value, $args[ $key ] );
 		}
-		$this->assertTrue( is_callable( $args['sanitize_callback'] ), 'sanitize_callback is callable' );
-		$this->asserttrue( is_callable( $args['sanitize_js_callback'] ), 'sanitize_js_callback is callable' );
+		$this->assertIsCallable( $args['sanitize_callback'], 'sanitize_callback is callable' );
+		$this->assertIsCallable( $args['sanitize_js_callback'], 'sanitize_js_callback is callable' );
 
 		remove_theme_support( 'customize-selective-refresh-widgets' );
 		$args = $this->manager->widgets->get_setting_args( 'widget_search[2]' );
@@ -443,8 +443,8 @@ public function test_get_setting_args() {
 		foreach ( $default_args as $key => $default_value ) {
 			$this->assertSame( $default_value, $args[ $key ] );
 		}
-		$this->assertTrue( is_callable( $args['sanitize_callback'] ), 'sanitize_callback is callable' );
-		$this->asserttrue( is_callable( $args['sanitize_js_callback'] ), 'sanitize_js_callback is callable' );
+		$this->assertIsCallable( $args['sanitize_callback'], 'sanitize_callback is callable' );
+		$this->assertIsCallable( $args['sanitize_js_callback'], 'sanitize_js_callback is callable' );
 		$this->assertSame( 'SIDEBARS_WIDGETS[SIDEBAR-1]', $args['uppercase_id_set_by_filter'] );
 
 		$override_args = array(
diff --git a/tests/phpunit/tests/multisite/wpCacheSwitchToBlogFallback.php b/tests/phpunit/tests/multisite/wpCacheSwitchToBlogFallback.php
index 35083088017b0..ffc3e1f263f6d 100644
--- a/tests/phpunit/tests/multisite/wpCacheSwitchToBlogFallback.php
+++ b/tests/phpunit/tests/multisite/wpCacheSwitchToBlogFallback.php
@@ -121,8 +121,8 @@ public function test_wp_cache_switch_to_blog_function_exists() {
 		$this->assertTrue( function_exists( 'wp_cache_switch_to_blog_fallback' ), 'wp_cache_switch_to_blog_fallback() should always exist' );
 
 		// Both should be callable.
-		$this->assertTrue( is_callable( 'wp_cache_switch_to_blog' ) );
-		$this->assertTrue( is_callable( 'wp_cache_switch_to_blog_fallback' ) );
+		$this->assertIsCallable( 'wp_cache_switch_to_blog' );
+		$this->assertIsCallable( 'wp_cache_switch_to_blog_fallback' );
 	}
 
 	/**