@sethvs The broken names was created specially for test "Cannot create from invalid module hashtables".

@iSazonov
I believe this is not the case.
Each testcase tests for some specific error in hashtable.

@{TestName = "Version+RequiredVersion"
ModuleSpecification = @{ ModuleName = "BadVersionModule"; ModuleVersion = "3.1"; RequiredVersion = "3.1" }},
@{TestName = "NoName"
ModuleSpecification = @{ ModuleVersion = "0.2" }},
@{TestName = "BadField"
ModuleSpecification = @{ ModuleName = "StrangeFieldModule"; RequiredVersion = "7.4"; Duck = "1.2" }},
@{TestName = "BadType"
ModuleSpecification = @{ ModuleName = "BadTypeModule"; RequiredVersion = "Hello!" }

Now, with Name instead of ModuleName, the code that checks the hashtable throws errors because of the wrong field - Name, instead of the actual error, that should be tested.

For example, the first testcase:

$ModuleSpecification = @{ Name = "BadVersionModule"; ModuleVersion = "3.1"; RequiredVersion = "3.1" }
[Microsoft.PowerShell.Commands.ModuleSpecification]::new($ModuleSpecification)

Exception calling ".ctor" with "1" argument(s): "The hashtable describing a module contains one or more members that are not valid.  The valid members are (ModuleName, ModuleVersion, RequiredVersion, GUID). Remove the members that are not valid ('Name'), then try again."
At line:1 char:1
+ [Microsoft.PowerShell.Commands.ModuleSpecification]::new($ModuleSpeci ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : ArgumentException

should actually be:

$ModuleSpecification = @{ ModuleName = "BadVersionModule"; ModuleVersion = "3.1"; RequiredVersion = "3.1" }
[Microsoft.PowerShell.Commands.ModuleSpecification]::new($ModuleSpecification)

Exception calling ".ctor" with "1" argument(s): "The parameters ModuleVersion and RequiredVersion cannot be used together. Please specify only one parameter."
At line:1 char:1
+ [Microsoft.PowerShell.Commands.ModuleSpecification]::new($ModuleSpeci ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : ArgumentException

@sethvs Thanks for your contribution. I have left a comment to make the test even more effective.