diff --git a/inc/field/checkboxesfield.class.php b/inc/field/checkboxesfield.class.php
index 218deffcf..dd294bf40 100644
--- a/inc/field/checkboxesfield.class.php
+++ b/inc/field/checkboxesfield.class.php
@@ -187,7 +187,6 @@ public function isValidValue($value): bool {
          return true;
       }
 
-      $value = Toolbox::stripslashes_deep($value);
       foreach ($value as $item) {
          if (trim($item) == '') {
             return false;
diff --git a/inc/field/radiosfield.class.php b/inc/field/radiosfield.class.php
index 314b4d644..07ec0daa1 100644
--- a/inc/field/radiosfield.class.php
+++ b/inc/field/radiosfield.class.php
@@ -205,7 +205,6 @@ public function isValidValue($value): bool {
       if ($value == '') {
          return true;
       }
-      $value = Toolbox::stripslashes_deep($value);
       $value = trim($value);
       return in_array($value, $this->getAvailableValues());
    }
diff --git a/tests/3-unit/GlpiPlugin/Formcreator/Field/CheckboxesField.php b/tests/3-unit/GlpiPlugin/Formcreator/Field/CheckboxesField.php
index bb861f97e..1f4aa2d47 100644
--- a/tests/3-unit/GlpiPlugin/Formcreator/Field/CheckboxesField.php
+++ b/tests/3-unit/GlpiPlugin/Formcreator/Field/CheckboxesField.php
@@ -95,37 +95,54 @@ public function providerIsValidValue() {
             ]
          ],
       ]));
-      return [
-         [
-            'instance' => $instance,
-            'value'    => '',
-            'expected' => true,
-         ],
-         [
-            'instance' => $instance,
-            'value'    => [],
-            'expected' => true,
-         ],
-         [
-            'instance' => $instance,
-            'value'    => ['1'],
-            'expected' => true,
-         ],
-         [
-            'instance' => $instance,
-            'value'    => ['1', '4'],
-            'expected' => true,
-         ],
-         [
-            'instance' => $instance,
-            'value'    => ['1', '9'],
-            'expected' => false,
-         ],
-         [
-            'instance' => $instance,
-            'value'    => ['9'],
-            'expected' => false,
+      yield [
+         'instance' => $instance,
+         'value'    => '',
+         'expected' => true,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => [],
+         'expected' => true,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => ['1'],
+         'expected' => true,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => ['1', '4'],
+         'expected' => true,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => ['1', '9'],
+         'expected' => false,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => ['9'],
+         'expected' => false,
+      ];
+
+      // values are escaped by GLPI, then backslashes are doubled
+      $instance = $this->newTestedInstance($this->getQuestion([
+         'fieldtype' => 'checkboxes',
+         'values'    => implode('\r\n', ['X:\\\\path\\\\to\\\\file', 'nothing']),
+         '_parameters'        => [
+            'checkboxes'         => [
+               'range'              => [
+                  'range_min'          => '',
+                  'range_max'          => '',
+               ]
+            ]
          ],
+      ]));
+      yield [
+         'instance' => $instance,
+         'value'    => ['X:\\path\\to\\file'],
+         'expected' => true,
       ];
    }
 
diff --git a/tests/3-unit/GlpiPlugin/Formcreator/Field/RadiosField.php b/tests/3-unit/GlpiPlugin/Formcreator/Field/RadiosField.php
index 756c73557..53dc4ecd3 100644
--- a/tests/3-unit/GlpiPlugin/Formcreator/Field/RadiosField.php
+++ b/tests/3-unit/GlpiPlugin/Formcreator/Field/RadiosField.php
@@ -100,6 +100,55 @@ public function testCanRequire() {
       $this->boolean($output)->isTrue();
    }
 
+   public function providerIsValidValue() {
+      $instance = $this->newTestedInstance($this->getQuestion([
+         'fieldtype' => 'radios',
+         'values'    => implode('\r\n', ['1', '2', '3', '4']),
+      ]));
+      yield [
+         'instance' => $instance,
+         'value'    => '',
+         'expected' => true,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => '1',
+         'expected' => true,
+      ];
+      yield [
+         'instance' => $instance,
+         'value'    => '9',
+         'expected' => false,
+      ];
+
+      // values are escaped by GLPI, then backslashes are doubled
+      $instance = $this->newTestedInstance($this->getQuestion([
+         'fieldtype' => 'radios',
+         'values'    => implode('\r\n', ['X:\\\\path\\\\to\\\\file', 'nothing']),
+         '_parameters'        => [
+            'checkboxes'         => [
+               'range'              => [
+                  'range_min'          => '',
+                  'range_max'          => '',
+               ]
+            ]
+         ],
+      ]));
+      yield [
+         'instance' => $instance,
+         'value'    => 'X:\\path\\to\\file',
+         'expected' => true,
+      ];
+   }
+
+   /**
+    * @dataProvider providerIsValidValue
+    */
+   public function testIsValidValue($instance, $value, $expected) {
+      $output = $instance->isValidValue($value);
+      $this->boolean($output)->isEqualTo($expected);
+   }
+
    public function providerSerializeValue() {
       $question = $this->getQuestion([
          'fieldtype' => 'radios',