diff --git a/MANIFEST.in b/MANIFEST.in
index c334445..3757e87 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1 @@
-include src/bison/c/bisondynlib.h
+include src/bison/c/*
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..35af5bc
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,8 @@
+# pytest.ini
+[pytest]
+minversion = 6.0
+addopts = -ra -q
+python_files = tests.py test_*.py *_tests.py
+testpaths =
+    src
+    tests
diff --git a/requirements.txt b/requirements.txt
index cfa25d1..db2e221 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,4 @@
 six
 Cython
+pytest
+pytest-cov
\ No newline at end of file
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..c4a5588
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,19 @@
+# content of: tox.ini , put in same dir as setup.py
+[tox]
+envlist = py39,py38
+
+[pytest]
+minversion = 6.0
+addopts = -ra -q
+testpaths =
+    src
+
+[testenv]
+deps =
+    pytest
+    pytest-cov
+
+commands =
+    pip install -r requirements.txt
+    pytest
+