Add missing imports in some regression tests

- test_issue7001-8000.py
- test_issue8190.py

spacy/tests/regression/test_issue7001-8000.py

@@ -1,3 +1,4 @@
+import pytest
 from spacy.cli.evaluate import print_textcats_auc_per_cat, print_prf_per_type
 from spacy.lang.en import English
 from spacy.training import Example

spacy/tests/regression/test_issue8190.py

@@ -1,3 +1,5 @@
+import pytest
+
 import spacy
 from spacy.lang.en import English
 from ..util import make_tempdir