diff --git a/src/tests/Metalama.Patterns.Contracts.UnitTests/RegularExpressionAttributeTests.cs b/src/tests/Metalama.Patterns.Contracts.UnitTests/RegularExpressionAttributeTests.cs
index deba2f02..f7c53f58 100644
--- a/src/tests/Metalama.Patterns.Contracts.UnitTests/RegularExpressionAttributeTests.cs
+++ b/src/tests/Metalama.Patterns.Contracts.UnitTests/RegularExpressionAttributeTests.cs
@@ -63,6 +63,22 @@ public void Given_FieldEmail_When_IncorrectValuePassed_Then_ExceptionIsThrown()
         Assert.Contains( "Email2", e.Message, StringComparison.Ordinal );
     }
 
+    [Fact]
+    public void Given_FieldEmail_When_ValidValueWithSingleQuote_Then_Success()
+    {
+        var cut = new RegexTestClass();
+
+        cut.Email2 = "Spirit.O'Crowd@foobusiness.borg.uk";
+    }
+
+    [Fact]
+    public void Given_FieldEmail_When_ValidValueWithDoubleQuote_Then_Success()
+    {
+        var cut = new RegexTestClass();
+
+        cut.Email2 = "\"Spirit O'Crowd\"@foobusiness.borg.uk";
+    }
+
     [Fact]
     public void Given_FieldWithPhone_When_CorrectValuePassed_Then_Success()
     {