The name of a «testCase» Behavior may be verbose and may use natural language, but should always start with a Capital letter.

Icon class
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Note kind
CONVENTION
NAMING
POLICY
UML keywords
Behavior
Activity
Interaction
NamedElement
NamedElement::name
SysMLv1.x keywords
TestCase
«testCase»
Keywords
This is consistent with the following as long as you don't plan to use the Activity for a CallBehaviorAction, noting:
Webel Best Practice: Prefer 'UpperCamelCase' (a.k.a. PascalCase) names for Behaviors such as Activities intended for use in CallBehaviorActions, or at least use a 'Capital first letter'; avoid 'all lower case' (as it leads to confusion with lower case Action names)
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[NAMING, POLICY]{STRONG} Prefer 'UpperCamelCase' (a.k.a. PascalCase) names for Behaviors such as Activities intended for use in CallBehaviorActions, or at least use a 'Capital first letter'; avoid 'all lower case' (as it leads to confusion with lower case Action names)
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