diff --git a/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzerTests.cs b/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzerTests.cs
index 4a5dee71..66564bcc 100644
--- a/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzerTests.cs
+++ b/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzerTests.cs
@@ -761,6 +761,33 @@ static IEnumerable<int> TestData(int first, int second, int third)
             RoslynAssert.Valid(analyzer, testCode);
         }
 
+        [Test]
+        public void AnalyzeWhenNumberOfParametersMatchNoImplicitlySuppliedCancellationTokenParameter()
+        {
+            var testCode = TestUtility.WrapClassInNamespaceAndAddUsing(@"
+    [TestFixture]
+    public class AnalyzeWhenNumberOfParametersMatch
+    {
+        [TestCaseSource(nameof(TestData), new object[] { 1, 3, 5 })]
+        [CancelAfter(10)]
+        public void ShortName(int number)
+        {
+            if (TestContext.CurrentContext.CancellationToken.IsCancellationRequested)
+                Assert.Ignore(""Cancelled"");
+            Assert.That(number, Is.GreaterThanOrEqualTo(0));
+        }
+
+        static IEnumerable<int> TestData(int first, int second, int third)
+        {
+            yield return first;
+            yield return second;
+            yield return third;
+        }
+    }", additionalUsings: "using System.Collections.Generic;");
+
+            RoslynAssert.Valid(analyzer, testCode);
+        }
+
         [Test]
         public void AnalyzeWhenNumberOfParametersDoesNotMatchNoParametersExpectedNoImplicitSuppliedCancellationToken()
         {
diff --git a/src/nunit.analyzers/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzer.cs b/src/nunit.analyzers/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzer.cs
index 8a3cd697..f4593d42 100644
--- a/src/nunit.analyzers/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzer.cs
+++ b/src/nunit.analyzers/TestCaseSourceUsage/TestCaseSourceUsesStringAnalyzer.cs
@@ -268,13 +268,13 @@ private static void AnalyzeAttribute(
                             }
                             else
                             {
-                                if (methodRequiredParameters + methodOptionalParameters != (hasCancelAfterAttribute ? 2 : 1))
+                                if (methodRequiredParameters != 1)
                                 {
                                     context.ReportDiagnostic(Diagnostic.Create(
                                             mismatchInNumberOfTestMethodParameters,
                                             syntaxNode.GetLocation(),
                                             1,
-                                            methodRequiredParameters + methodOptionalParameters));
+                                            methodRequiredParameters));
                                 }
                                 else
                                 {