diff --git a/core/modules/locale/tests/locale_test.js b/core/modules/locale/tests/locale_test.js
index 86acc4a13c..fda9b6f161 100644
--- a/core/modules/locale/tests/locale_test.js
+++ b/core/modules/locale/tests/locale_test.js
@@ -9,11 +9,11 @@ Drupal.t("Standard Call t");
 Drupal.t("Whitespace Call t");
 
 Drupal.t('Single Quote t');
-Drupal.t('Single Quote \'Escaped\' t');
+Drupal.t('Single Quote " \'Escaped\' t');
 Drupal.t('Single Quote ' + 'Concat ' + 'strings ' + 't');
 
 Drupal.t("Double Quote t");
-Drupal.t("Double Quote \"Escaped\" t");
+Drupal.t("Double Quote ' \"Escaped\" t");
 Drupal.t("Double Quote " + "Concat " + "strings " + "t");
 
 Drupal.t("Context Unquoted t", {}, { context: "Context string unquoted" });
@@ -26,10 +26,10 @@ Drupal.formatPlural(1, "Standard Call plural", "Standard Call @count plural");
 Drupal.formatPlural(1, "Whitespace Call plural", "Whitespace Call @count plural");
 
 Drupal.formatPlural(1, 'Single Quote plural', 'Single Quote @count plural');
-Drupal.formatPlural(1, 'Single Quote \'Escaped\' plural', 'Single Quote \'Escaped\' @count plural');
+Drupal.formatPlural(1, 'Single Quote " \'Escaped\' plural', 'Single Quote " \'Escaped\' @count plural');
 
 Drupal.formatPlural(1, "Double Quote plural", "Double Quote @count plural");
-Drupal.formatPlural(1, "Double Quote \"Escaped\" plural", "Double Quote \"Escaped\" @count plural");
+Drupal.formatPlural(1, "Double Quote ' \"Escaped\" plural", "Double Quote ' \"Escaped\" @count plural");
 
 Drupal.formatPlural(1, "Context Unquoted plural", "Context Unquoted @count plural", {}, { context: "Context string unquoted" });
 Drupal.formatPlural(1, "Context Single Quoted plural", "Context Single Quoted @count plural", {}, { 'context': "Context string single quoted" });
diff --git a/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php b/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
index bbb825832b..d39bf03791 100644
--- a/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
@@ -46,11 +46,11 @@ public function testFileParsing() {
       'Whitespace Call t' => '',
 
       'Single Quote t' => '',
-      "Single Quote \\'Escaped\\' t" => '',
+      "Single Quote \" \\'Escaped\\' t" => '',
       'Single Quote Concat strings t' => '',
 
       'Double Quote t' => '',
-      "Double Quote \\\"Escaped\\\" t" => '',
+      "Double Quote ' \\\"Escaped\\\" t" => '',
       'Double Quote Concat strings t' => '',
 
       'Context !key Args t' => 'Context string',
@@ -63,10 +63,10 @@ public function testFileParsing() {
       "Whitespace Call plural{$etx}Whitespace Call @count plural" => '',
 
       "Single Quote plural{$etx}Single Quote @count plural" => '',
-      "Single Quote \\'Escaped\\' plural{$etx}Single Quote \\'Escaped\\' @count plural" => '',
+      "Single Quote \" \\'Escaped\\' plural{$etx}Single Quote \" \\'Escaped\\' @count plural" => '',
 
       "Double Quote plural{$etx}Double Quote @count plural" => '',
-      "Double Quote \\\"Escaped\\\" plural{$etx}Double Quote \\\"Escaped\\\" @count plural" => '',
+      "Double Quote ' \\\"Escaped\\\" plural{$etx}Double Quote ' \\\"Escaped\\\" @count plural" => '',
 
       "Context !key Args plural{$etx}Context !key Args @count plural" => 'Context string',