diff --git a/sonar-javascript-plugin/src/main/java/org/sonar/plugins/javascript/css/rules/UnitNoUnknown.java b/sonar-javascript-plugin/src/main/java/org/sonar/plugins/javascript/css/rules/UnitNoUnknown.java
index 7a9e5fd477..153a1d0687 100644
--- a/sonar-javascript-plugin/src/main/java/org/sonar/plugins/javascript/css/rules/UnitNoUnknown.java
+++ b/sonar-javascript-plugin/src/main/java/org/sonar/plugins/javascript/css/rules/UnitNoUnknown.java
@@ -19,8 +19,6 @@
  */
 package org.sonar.plugins.javascript.css.rules;
 
-import java.util.Arrays;
-import java.util.List;
 import org.sonar.check.Rule;
 
 @Rule(key = "S4653")
@@ -30,14 +28,4 @@ public class UnitNoUnknown implements CssRule {
   public String stylelintKey() {
     return "unit-no-unknown";
   }
-
-  @Override
-  public List<Object> stylelintOptions() {
-    return Arrays.asList(true, new StylelintIgnoreOption());
-  }
-
-  private static class StylelintIgnoreOption {
-    // Used by GSON serialization
-    private final String[] ignoreUnits = {"x"};
-  }
 }
diff --git a/sonar-javascript-plugin/src/test/java/org/sonar/plugins/javascript/css/rules/CssRuleTest.java b/sonar-javascript-plugin/src/test/java/org/sonar/plugins/javascript/css/rules/CssRuleTest.java
index 78f74b3aa3..fceb9f5187 100644
--- a/sonar-javascript-plugin/src/test/java/org/sonar/plugins/javascript/css/rules/CssRuleTest.java
+++ b/sonar-javascript-plugin/src/test/java/org/sonar/plugins/javascript/css/rules/CssRuleTest.java
@@ -48,8 +48,7 @@ void rules_default_is_empty() throws NoSuchMethodException, IllegalAccessExcepti
       PropertyNoUnknown.class,
       SelectorPseudoClassNoUnknown.class,
       SelectorPseudoElementNoUnknown.class,
-      SelectorTypeNoUnknown.class,
-      UnitNoUnknown.class);
+      SelectorTypeNoUnknown.class);
 
     for (Class ruleClass : CssRules.getRuleClasses()) {
       CssRule rule = (CssRule)ruleClass.getConstructor().newInstance();
@@ -106,12 +105,6 @@ void selector_pseudo_element_no_unknown_custom() {
     assertThat(optionsAsJson).isEqualTo("[true,{\"ignorePseudoElements\":[\"ng-deep\",\"/^custom-/\"]}]");
   }
 
-  @Test
-  void units_no_unknown_options() {
-    String optionsAsJson = new Gson().toJson(new UnitNoUnknown().stylelintOptions());
-    assertThat(optionsAsJson).isEqualTo("[true,{\"ignoreUnits\":[\"x\"]}]");
-  }
-
   @Test
   void at_rule_unknown_default() {
     String optionsAsJson = new Gson().toJson(new AtRuleNoUnknown().stylelintOptions());