HighSchoolSweetheartstests won't work in C#

Hello. When I run the test suite, I get the following error:

Failed HighSchoolSweetheartsTests.DisplaySingleLine [2 ms]
  Error message:
   Assert.Equal() Failure
                          ↓ (pos 30)
Expected: --- Lance Green ♡ Pat Riley
Actual: ---   Lance Green ? Pat Riley
                          ↑ (pos 30)

I copied the :heart: character from the source code of the tests suite. I’m using Visual Studio 2022 Community with SDK 8.0. I’m running Windows 11 Pro.
By copying my code into the online editor, the tests pass and I was able to validate the exercise

That looks like an encoding issue. Maybe your file’s local encoding is wrong somehow?