diff --git a/CHANGELOG.md b/CHANGELOG.md
index 687e4e04..d8557774 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ For a full diff see [`2.6.1...main`][2.6.1...main].
 * Enabled `clean_namespace` fixer ([#280]), by [@localheinz]
 * Enabled `lambda_not_used_import` fixer ([#281]), by [@localheinz]
 * Enabled `no_alias_language_construct_call` fixer ([#282]), by [@localheinz]
+* Enabled `no_trailing_whitespace_in_string` fixer ([#283]), by [@localheinz]
 
 ## [`2.6.1`][2.6.1]
 
diff --git a/src/RuleSet/Php71.php b/src/RuleSet/Php71.php
index 1225f363..33a3976e 100644
--- a/src/RuleSet/Php71.php
+++ b/src/RuleSet/Php71.php
@@ -227,7 +227,7 @@ final class Php71 extends AbstractRuleSet
         'no_trailing_comma_in_singleline_array' => true,
         'no_trailing_whitespace' => true,
         'no_trailing_whitespace_in_comment' => true,
-        'no_trailing_whitespace_in_string' => false,
+        'no_trailing_whitespace_in_string' => true,
         'no_unneeded_control_parentheses' => true,
         'no_unneeded_curly_braces' => true,
         'no_unneeded_final_method' => true,
diff --git a/src/RuleSet/Php73.php b/src/RuleSet/Php73.php
index cc53d26a..4c7feafb 100644
--- a/src/RuleSet/Php73.php
+++ b/src/RuleSet/Php73.php
@@ -227,7 +227,7 @@ final class Php73 extends AbstractRuleSet
         'no_trailing_comma_in_singleline_array' => true,
         'no_trailing_whitespace' => true,
         'no_trailing_whitespace_in_comment' => true,
-        'no_trailing_whitespace_in_string' => false,
+        'no_trailing_whitespace_in_string' => true,
         'no_unneeded_control_parentheses' => true,
         'no_unneeded_curly_braces' => true,
         'no_unneeded_final_method' => true,
diff --git a/src/RuleSet/Php74.php b/src/RuleSet/Php74.php
index 0c6f541b..9b3d8bec 100644
--- a/src/RuleSet/Php74.php
+++ b/src/RuleSet/Php74.php
@@ -227,7 +227,7 @@ final class Php74 extends AbstractRuleSet
         'no_trailing_comma_in_singleline_array' => true,
         'no_trailing_whitespace' => true,
         'no_trailing_whitespace_in_comment' => true,
-        'no_trailing_whitespace_in_string' => false,
+        'no_trailing_whitespace_in_string' => true,
         'no_unneeded_control_parentheses' => true,
         'no_unneeded_curly_braces' => true,
         'no_unneeded_final_method' => true,
diff --git a/test/Unit/RuleSet/Php71Test.php b/test/Unit/RuleSet/Php71Test.php
index 2500cf7f..8e6e7dea 100644
--- a/test/Unit/RuleSet/Php71Test.php
+++ b/test/Unit/RuleSet/Php71Test.php
@@ -233,7 +233,7 @@ final class Php71Test extends AbstractRuleSetTestCase
         'no_trailing_comma_in_singleline_array' => true,
         'no_trailing_whitespace' => true,
         'no_trailing_whitespace_in_comment' => true,
-        'no_trailing_whitespace_in_string' => false,
+        'no_trailing_whitespace_in_string' => true,
         'no_unneeded_control_parentheses' => true,
         'no_unneeded_curly_braces' => true,
         'no_unneeded_final_method' => true,
diff --git a/test/Unit/RuleSet/Php73Test.php b/test/Unit/RuleSet/Php73Test.php
index e6c24c90..85df196d 100644
--- a/test/Unit/RuleSet/Php73Test.php
+++ b/test/Unit/RuleSet/Php73Test.php
@@ -233,7 +233,7 @@ final class Php73Test extends AbstractRuleSetTestCase
         'no_trailing_comma_in_singleline_array' => true,
         'no_trailing_whitespace' => true,
         'no_trailing_whitespace_in_comment' => true,
-        'no_trailing_whitespace_in_string' => false,
+        'no_trailing_whitespace_in_string' => true,
         'no_unneeded_control_parentheses' => true,
         'no_unneeded_curly_braces' => true,
         'no_unneeded_final_method' => true,
diff --git a/test/Unit/RuleSet/Php74Test.php b/test/Unit/RuleSet/Php74Test.php
index 48fdf308..514120c4 100644
--- a/test/Unit/RuleSet/Php74Test.php
+++ b/test/Unit/RuleSet/Php74Test.php
@@ -233,7 +233,7 @@ final class Php74Test extends AbstractRuleSetTestCase
         'no_trailing_comma_in_singleline_array' => true,
         'no_trailing_whitespace' => true,
         'no_trailing_whitespace_in_comment' => true,
-        'no_trailing_whitespace_in_string' => false,
+        'no_trailing_whitespace_in_string' => true,
         'no_unneeded_control_parentheses' => true,
         'no_unneeded_curly_braces' => true,
         'no_unneeded_final_method' => true,