Fix a typo

GitHubPang · web-flow · commit 61502c05bac5 · 2021-09-30T10:17:43.000+08:00
diff --git a/RUNNING_TESTS.md b/RUNNING_TESTS.md
@@ -98,7 +98,7 @@ On MacOS, Linux, BSD use:
 run-test.sh
 ```
 
-## Running Individual Suites or Test Casess
+## Running Individual Suites or Test Cases
 
 Running individual tests and fixtures on Windows is trivial using the Visual Studio test runner.
 To run a specific tests fixture on MacOS or Linux, use the NUnit filter expressions to select the tests to be run:
