Minor bugfixes, styling, test import cleaning #602

Job	Run time
Unit Tests (ubuntu-latest, 3.8)	3m 3s
Unit Tests (ubuntu-latest, 3.9)	2m 43s
Unit Tests (ubuntu-latest, 3.10)	2m 48s
Unit Tests (ubuntu-latest, 3.11)	2m 40s
Unit Tests (ubuntu-latest, 3.12)	3m 12s
Unit Tests (windows-latest, 3.8)	3m 38s
Unit Tests (windows-latest, 3.9)	3m 56s
Unit Tests (windows-latest, 3.10)	4m 5s
Unit Tests (windows-latest, 3.11)	4m 35s
Unit Tests (windows-latest, 3.12)	4m 44s
Unit Tests (macos-latest, 3.8)	2m 28s
Unit Tests (macos-latest, 3.9)	1m 55s
Unit Tests (macos-latest, 3.10)	1m 57s
Unit Tests (macos-latest, 3.11)	2m 7s
Unit Tests (macos-latest, 3.12)	2m 17s
Indicate completion to coveralls.io	9s
	46m 17s

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