Probably don't need 3.7 for coverage

tox.ini

@@ -44,11 +44,6 @@ extras = tests
 commands = coverage run -m pytest {posargs}
 
 
-[testenv:py37]
-extras = tests
-commands = coverage run -m pytest {posargs}
-
-
 [testenv:py310]
 # Python 3.6+ has a number of compile-time warnings on invalid string escapes.
 # PYTHONWARNINGS=d and --no-compile below make them visible during the Tox run.
@@ -62,7 +57,7 @@ commands = coverage run -m pytest {posargs}
 
 [testenv:coverage-report]
 basepython = python3.10
-depends = py37,py310
+depends = py36,py310
 skip_install = true
 deps = coverage[toml]>=5.4
 commands =