diff --git a/RegExpSupport/src/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspection.java b/RegExpSupport/src/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspection.java
index 6e175fc47feb..4c0004233d68 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspection.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspection.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package org.intellij.lang.regexp.inspection;
 
 import com.intellij.codeInspection.*;
@@ -62,7 +62,7 @@ public class RegExpSimplifiableInspection extends LocalInspectionTool {
         if (elements.length == 1) {
           final RegExpClassElement element = elements[0];
           if (element instanceof RegExpPosixBracketExpression) return;
-          if (!(element instanceof RegExpCharRange)) {
+          if (!(element instanceof RegExpCharRange) && !(element instanceof RegExpIntersection)) {
             if (!(element instanceof RegExpChar) || !"{}().*+?|$".contains(element.getText())) {
               // [a] -> a
               registerProblem(regExpClass, element.getUnescapedText());
diff --git a/RegExpSupport/test/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspectionTest.java b/RegExpSupport/test/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspectionTest.java
index 9ac0cb2a8c4e..558f84d7172e 100644
--- a/RegExpSupport/test/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspectionTest.java
+++ b/RegExpSupport/test/org/intellij/lang/regexp/inspection/RegExpSimplifiableInspectionTest.java
@@ -1,4 +1,4 @@
-// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package org.intellij.lang.regexp.inspection;
 
 import com.intellij.codeInspection.CommonQuickFixBundle;
@@ -37,6 +37,11 @@ public class RegExpSimplifiableInspectionTest extends RegExpInspectionTestCase {
     highlightTest("[0-9abc]"); // no warn; replacing with \d is not equivalent in Unicode context
   }
 
+  public void testIntersection() {
+    highlightTest("^[\\p{ASCII}&&[^@]]+@[\\p{ASCII}&&[^@]]+$");
+    highlightTest("[\\W&&\\S]");
+  }
+
   public void testSingleElementClass() {
     doTest("[a]", "a");
   }