diff --git a/src/nunit.analyzers.tests/UpdateStringFormatToInterpolatableString/UpdateStringFormatToInterpolatableStringCodeFixTests.cs b/src/nunit.analyzers.tests/UpdateStringFormatToInterpolatableString/UpdateStringFormatToInterpolatableStringCodeFixTests.cs
index da3ef6f8..5ebfc285 100644
--- a/src/nunit.analyzers.tests/UpdateStringFormatToInterpolatableString/UpdateStringFormatToInterpolatableStringCodeFixTests.cs
+++ b/src/nunit.analyzers.tests/UpdateStringFormatToInterpolatableString/UpdateStringFormatToInterpolatableStringCodeFixTests.cs
@@ -130,6 +130,22 @@ public void TestEscapedBraces()
 
             RoslynAssert.CodeFix(analyzer, fix, expectedDiagnostic, code, fixedCode);
         }
+
+        [Test]
+        public void TestConditionalExpressionArgument()
+        {
+            var code = TestUtility.WrapInTestMethod(@"
+                string? someValue = ""Value"";
+                ↓Assert.Pass(""Value is {0}"", someValue is null ? ""null"" : someValue);
+            ");
+
+            var fixedCode = TestUtility.WrapInTestMethod(@"
+                string? someValue = ""Value"";
+                Assert.Pass($""Value is {(someValue is null ? ""null"" : someValue)}"");
+            ");
+
+            RoslynAssert.CodeFix(analyzer, fix, expectedDiagnostic, code, fixedCode);
+        }
 #endif
 
     }
diff --git a/src/nunit.analyzers/Helpers/CodeFixHelper.cs b/src/nunit.analyzers/Helpers/CodeFixHelper.cs
index 0fe35241..61ccd3ba 100644
--- a/src/nunit.analyzers/Helpers/CodeFixHelper.cs
+++ b/src/nunit.analyzers/Helpers/CodeFixHelper.cs
@@ -162,7 +162,7 @@ internal static IEnumerable<InterpolatedStringContentSyntax> UpdateStringFormatT
                                           .OfType<ConditionalExpressionSyntax>()
                                           .Any())
                         {
-                            // Colon is not allowed in an Interpolation, wrap expression in parenthesis: (expession).
+                            // Colon is not allowed in an Interpolation, wrap expression in parenthesis: (expression).
                             formatArgument = SyntaxFactory.ParenthesizedExpression(formatArgument);
                         }