CI: Use --strict-markers for pytest 6.0.2 (#38478)

Co-authored-by: Matt Roeschke <mroeschke@housecanary.com>

Author: mroeschke

.github/workflows/ci.yml

@@ -64,7 +64,7 @@ jobs:
  - name: Testing docstring validation script
  run: |
  source activate pandas-dev
- pytest --capture=no --strict scripts
+ pytest --capture=no --strict-markers scripts
  if: always()
 
  - name: Running benchmarks

ci/run_tests.sh

@@ -20,7 +20,7 @@ if [[ $(uname) == "Linux" && -z $DISPLAY ]]; then
  XVFB="xvfb-run "
 fi
 
-PYTEST_CMD="${XVFB}pytest -m \"$PATTERN\" -n $PYTEST_WORKERS --dist=loadfile -s --strict --durations=30 --junitxml=test-data.xml $TEST_ARGS $COVERAGE pandas"
+PYTEST_CMD="${XVFB}pytest -m \"$PATTERN\" -n $PYTEST_WORKERS --dist=loadfile -s --strict-markers --durations=30 --junitxml=test-data.xml $TEST_ARGS $COVERAGE pandas"
 
 if [[ $(uname) != "Linux" && $(uname) != "Darwin" ]]; then
  # GH#37455 windows py38 build appears to be running out of memory

test_fast.bat

@@ -1,3 +1,3 @@
 :: test on windows
 set PYTHONHASHSEED=314159265
-pytest --skip-slow --skip-network --skip-db -m "not single" -n 4 -r sXX --strict pandas
+pytest --skip-slow --skip-network --skip-db -m "not single" -n 4 -r sXX --strict-markers pandas

test_fast.sh

@@ -5,4 +5,4 @@
 # https://github.com/pytest-dev/pytest/issues/1075
 export PYTHONHASHSEED=$(python -c 'import random; print(random.randint(1, 4294967295))')
 
-pytest pandas --skip-slow --skip-network --skip-db -m "not single" -n 4 -r sxX --strict "$@"
+pytest pandas --skip-slow --skip-network --skip-db -m "not single" -n 4 -r sxX --strict-markers "$@"