diff --git a/README.md b/README.md
index fb5de68..cdf03f8 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,15 @@ This repository contains scripts for automating analysis of QCTools reports.
 * Install Package
   `python -m pip install .`
 
+### Test Code
+
+* Activate virtual env (see Install from source) 
+* Install pytest 
+  `pip install pytest`
+* Run tests
+  `python -m pytest`
+
+
 ### Scripts:
 
 - **`qct-parse`**  
diff --git a/pyproject.toml b/pyproject.toml
index e7ee374..0de5939 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,3 +19,8 @@ qct-parse = "qct_parse.qct_parse:main"
 
 [tool.tox]
 envlist = ["3.9", "3.10", "3.11", "3.12", "3.13"]
+
+[tool.tox.env_run_base]
+description = "Run test under {base_python}"
+commands = [["pytest"]]
+deps = ["pytest"]
diff --git a/tests/test_qct_parse.py b/tests/test_qct_parse.py
new file mode 100644
index 0000000..483d2c1
--- /dev/null
+++ b/tests/test_qct_parse.py
@@ -0,0 +1,4 @@
+from qct_parse import qct_parse
+
+def test_dts2ts():
+    assert qct_parse.dts2ts("0.0330000") == '00:00:00.0330'