When using TestParameterInjector, parameterizing a test method parameter with @TestParameter and only a single input value adds test runner and annotation overhead without testing multiple cases. Instead, declare a local variable initialized to that value inside the test method. This also avoids parsing values from strings at runtime and, for enums, replaces string literals with direct symbol references so cross-references and refactoring tools work properly.

@Test
public void someTest(
    @TestParameter("RED") Color color,
    @TestParameter boolean enabled) {
  ...
}

@Test
public void someTest(@TestParameter boolean enabled) {
  Color color = Color.RED;
  ...
}