MSTEST0003: Test methods should have valid layout

Property	Value
Rule ID	MSTEST0003
Title	Test methods should have valid layout
Category	Usage
Fix is breaking or non-breaking	Breaking
Enabled by default	Yes
Default severity	Warning (escalated to Error when setting MSTestAnalysisMode to Recommended or All)
Introduced in version	3.2.0
Is there a code fix	Yes

Cause

A test method is not following single or multiple points of the required test method layout.

Rule description

Test methods (methods marked with the [TestMethod] attribute) should follow the given layout to be considered valid by MSTest:

• they should be public (or internal if [assembly: DiscoverInternals] attribute is set)
• they should not be static
• they should not be generic if using MSTest 3.7 or earlier
• they should not be abstract
• they should return void or Task
• they should not be async void
• they should not be a special method (constructor, finalizer, operator...)
• the type declaring this method should be public

How to fix violations

Ensure that the test method matches the required layout described above.

When to suppress warnings

Do not suppress a warning from this rule. Ignoring this rule will result in tests being ignored, because MSTest will not consider this method to be a test method.

Suppress a warning

If you just want to suppress a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable MSTEST0003
// The code that's violating the rule is on this line.
#pragma warning restore MSTEST0003

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.MSTEST0003.severity = none

For more information, see How to suppress code analysis warnings.