diff --git a/tests/phpunit/tests/link/themeFile.php b/tests/phpunit/tests/link/themeFile.php
index fe0dbcfe42..9b0a895d86 100644
--- a/tests/phpunit/tests/link/themeFile.php
+++ b/tests/phpunit/tests/link/themeFile.php
@@ -106,8 +106,8 @@ class Test_Theme_File extends WP_UnitTestCase {
 	 * @dataProvider data_theme_files
 	 */
 	public function test_theme_file_uri_returns_valid_uri( $file, $expected_theme, $existence ) {
-		$uri        = get_theme_file_uri( $file );
-		$parent_uri = get_parent_theme_file_uri( $file );
+		$uri        = str_replace( ' ', '%20', get_theme_file_uri( $file ) );
+		$parent_uri = str_replace( ' ', '%20', get_parent_theme_file_uri( $file ) );
 
 		$this->assertSame( esc_url_raw( $uri ), $uri );
 		$this->assertSame( esc_url_raw( $parent_uri ), $parent_uri );