diff --git a/tests/.configs/pytest-py27.ini b/tests/.configs/pytest-py27.ini
new file mode 100644
index 00000000..39b798f9
--- /dev/null
+++ b/tests/.configs/pytest-py27.ini
@@ -0,0 +1,3 @@
+[pytest]
+testpaths = tests/unit
+python_files = test_*_py2_py3.py
diff --git a/tests/.configs/pytest-py34-py35.ini b/tests/.configs/pytest-py34-py35.ini
new file mode 100644
index 00000000..90a4557a
--- /dev/null
+++ b/tests/.configs/pytest-py34-py35.ini
@@ -0,0 +1,3 @@
+[pytest]
+testpaths = tests/unit
+python_files = test_*_py3.py
diff --git a/tests/.configs/pytest.ini b/tests/.configs/pytest.ini
new file mode 100644
index 00000000..f564c59a
--- /dev/null
+++ b/tests/.configs/pytest.ini
@@ -0,0 +1,3 @@
+[pytest]
+testpaths = tests/unit
+python_files = test_*_py3*.py
diff --git a/tox.ini b/tox.ini
index 553cc4fc..8950f60a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,9 +2,6 @@
 envlist=
     coveralls, pylint, flake8, pydocstyle, 2.7, 3.5, 3.6, 3.7, 3.8, 3.9, pypy2, pypy3
 
-[pytest]
-testpaths = tests/unit
-
 [testenv]
 deps=
     pytest
@@ -21,7 +18,7 @@ extras=
     pydantic
     flask
     aiohttp
-commands = pytest
+commands = pytest -c tests/.configs/pytest.ini
 python_files = test_*_py3*.py
 
 [testenv:coveralls]
@@ -45,8 +42,7 @@ deps=
 extras=
     yaml
     flask
-commands = pytest
-python_files = test_*_py2_py3.py
+commands = pytest -c tests/.configs/py27.ini
 
 [testenv:3.5]
 deps=
@@ -55,7 +51,7 @@ deps=
 extras=
     yaml
     flask
-python_files = test_*_py3.py
+commands = pytest -c tests/.configs/pytest-py34-py35.ini
 
 [testenv:pypy2]
 deps=
@@ -63,7 +59,7 @@ deps=
 extras=
     yaml
     flask
-python_files = test_*_py2_py3.py
+commands = pytest -c tests/.configs/py27.ini
 
 [testenv:pypy3]
 deps=
@@ -75,7 +71,7 @@ deps=
 extras=
     yaml
     flask
-python_files = test_*_py2_py3.py
+commands = pytest -c tests/.configs/py27.ini
 
 
 [testenv:pylint]