2 files changed, 5 insertions, 4 deletions
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/SelectorTypeNoUnknown.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/SelectorTypeNoUnknown.java
index abcf430..c7bc201 100644
--- a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/SelectorTypeNoUnknown.java
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/rules/SelectorTypeNoUnknown.java
@@ -29,7 +29,8 @@ import static org.sonar.css.plugin.rules.RuleUtils.splitAndTrim;
 @Rule(key = "S4670")
 public class SelectorTypeNoUnknown implements CssRule {
 
-  private static final String DEFAULT_IGNORED_TYPES = "/^mat-/";
+  // prefixes for Angular Material (mat, md), Font Awesome (fa)
+  private static final String DEFAULT_IGNORED_TYPES = "/^(mat|md|fa)-/";
 
   @RuleProperty(
     key = "ignoreTypes",
diff --git a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java
index 044f4f4..e7945b7 100644
--- a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java
+++ b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/rules/CssRuleTest.java
@@ -74,15 +74,15 @@ public class CssRuleTest {
   @Test
   public void selector_type_no_unknown_default() {
     String optionsAsJson = new Gson().toJson(new SelectorTypeNoUnknown().stylelintOptions());
-    assertThat(optionsAsJson).isEqualTo("[true,{\"ignoreTypes\":[\"/^mat-/\"]}]");
+    assertThat(optionsAsJson).isEqualTo("[true,{\"ignoreTypes\":[\"/^(mat|md|fa)-/\"]}]");
   }
 
   @Test
   public void selector_type_no_unknown_custom() {
     SelectorTypeNoUnknown selectorTypeNoUnknown = new SelectorTypeNoUnknown();
-    selectorTypeNoUnknown.ignoreTypes = "/^mat-/, /^fa-/";
+    selectorTypeNoUnknown.ignoreTypes = "/^(mat|md|fa)-/";
     String optionsAsJson = new Gson().toJson(selectorTypeNoUnknown.stylelintOptions());
-    assertThat(optionsAsJson).isEqualTo("[true,{\"ignoreTypes\":[\"/^mat-/\",\"/^fa-/\"]}]");
+    assertThat(optionsAsJson).isEqualTo("[true,{\"ignoreTypes\":[\"/^(mat|md|fa)-/\"]}]");
   }
 
   @Test