sunpy needs its own ini file

so their doctest won't fail here.

sunpy_tst.ini

@@ -0,0 +1,18 @@
+[tool:pytest]
+testpaths = "sunpy" "docs"
+norecursedirs = ".tox" "build" "docs[\/]_build" "docs[\/]generated" "*.egg-info" "examples" "sunpy[/\]_dev" ".jupyter" ".history" "tools" "sunpy[\/]extern" "benchmarks"
+doctest_plus = enabled
+doctest_optionflags = NORMALIZE_WHITESPACE FLOAT_CMP ELLIPSIS
+addopts = --dist no --arraydiff --doctest-rst --doctest-ignore-import-errors -p no:unraisableexception -p no:threadexception
+asdf_schema_tests_enabled = true
+asdf_schema_root = sunpy/io/special/asdf/resources/
+mpl-results-path = figure_test_images
+mpl-use-full-test-name = True
+markers =
+    remote_data: marks this test function as needing remote data.
+    online: marks this test function as needing online connectivity.
+    mpl_image_compare: marks this test function as using hash-based Matplotlib figure verification. This mark is not meant to be directly applied, but is instead automatically applied when a test function uses the @sunpy.tests.helpers.figure_test decorator.
+    flaky
+    array_compare
+remote_data_strict = True
+# We do not care about junit_family or filterwarnings here.

tox.ini

@@ -49,4 +49,4 @@ commands =
     reproject,all: pytest --pyargs reproject
     specreduce,all: pytest --pyargs specreduce
     specutils,all: pytest --pyargs specutils
-    sunpy,all: pytest --pyargs sunpy --doctest-ignore-import-errors
+    sunpy,all: pytest --pyargs sunpy -c sunpy_tst.ini