diff --git a/.gitignore b/.gitignore
index 0e9dea3..b1a322d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ __pycache__
 cloud-spanner-emulator*
 emulator_main
 gateway_main
+.spanner_emulator/**
diff --git a/spanner_emulator/.keep b/spanner_emulator/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..67f2a4d
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,28 @@
+# tox (https://tox.readthedocs.io/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py36, py37, py38
+
+[testenv]
+deps =
+  absl-py
+  google-api-core
+  google-cloud-spanner >= 1.17.1
+  frozendict
+  portpicker
+  pytest
+allowlist_externals =
+  wget
+  tar
+  chmod
+setenv =
+  SPANNER_EMULATOR_VERSION=1.2.0
+  SPANNER_EMULATOR_BINARY_PATH=.spanner_emulator/emulator_main
+commands =
+    wget https://storage.googleapis.com/cloud-spanner-emulator/releases/{env:SPANNER_EMULATOR_VERSION}/cloud-spanner-emulator_linux_amd64-{env:SPANNER_EMULATOR_VERSION}.tar.gz -P .spanner_emulator/
+    tar zxvf .spanner_emulator/cloud-spanner-emulator_linux_amd64-{env:SPANNER_EMULATOR_VERSION}.tar.gz -C .spanner_emulator/
+    chmod u+x .spanner_emulator/gateway_main .spanner_emulator/emulator_main
+    pytest