diff --git a/analyzers/tests/SonarAnalyzer.Test/Rules/SpecifyTimeoutOnRegexTest.cs b/analyzers/tests/SonarAnalyzer.Test/Rules/SpecifyTimeoutOnRegexTest.cs
index 846b8350df8..ff08af5910e 100644
--- a/analyzers/tests/SonarAnalyzer.Test/Rules/SpecifyTimeoutOnRegexTest.cs
+++ b/analyzers/tests/SonarAnalyzer.Test/Rules/SpecifyTimeoutOnRegexTest.cs
@@ -45,8 +45,14 @@ public void SpecifyTimeoutOnRegex_CS() =>
     [TestMethod]
     public void SpecifyTimeoutOnRegex_CSharp8() =>
         builderCS.AddPaths("SpecifyTimeoutOnRegex.CSharp9.cs")
-        .WithOptions(ParseOptionsHelper.FromCSharp9)
-        .Verify();
+            .WithOptions(ParseOptionsHelper.FromCSharp9)
+            .Verify();
+
+    [TestMethod]
+    public void SpecifyTimeoutOnRegex_DefaultMatchTimeout() =>
+        builderCS.AddPaths("SpecifyTimeoutOnRegex.DefaultMatchTimeout.cs")
+            .WithTopLevelStatements()
+            .Verify();
 
     [TestMethod]
     public void SpecifyTimeoutOnRegex_VB() =>
diff --git a/analyzers/tests/SonarAnalyzer.Test/TestCases/Hotspots/SpecifyTimeoutOnRegex.DefaultMatchTimeout.cs b/analyzers/tests/SonarAnalyzer.Test/TestCases/Hotspots/SpecifyTimeoutOnRegex.DefaultMatchTimeout.cs
new file mode 100644
index 00000000000..2da44dad331
--- /dev/null
+++ b/analyzers/tests/SonarAnalyzer.Test/TestCases/Hotspots/SpecifyTimeoutOnRegex.DefaultMatchTimeout.cs
@@ -0,0 +1,10 @@
+using System.Text.RegularExpressions;
+using System;
+
+AppDomain.CurrentDomain.SetData("REGEX_DEFAULT_MATCH_TIMEOUT", TimeSpan.FromMilliseconds(100));
+
+void RegexPattern(string input)
+{
+    _ = new Regex(".+@.+", RegexOptions.None);  // Noncompliant, FP REGEX_DEFAULT_MATCH_TIMEOUT is set in the AppDomain
+    _ = Regex.IsMatch(input, "[0-9]+");         // Noncompliant, FP REGEX_DEFAULT_MATCH_TIMEOUT is set in the AppDomain
+}