diff --git a/source/run-command/run-command.rst b/source/run-command/run-command.md
similarity index 100%
rename from source/run-command/run-command.rst
rename to source/run-command/run-command.md
diff --git a/source/run-command/tests/README.rst b/source/run-command/tests/README.rst
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+++ b/source/run-command/tests/README.rst
@@ -0,0 +1,14 @@
+=================
+Run Command Tests
+=================
+
+.. contents::
+
+----
+
+Introduction
+============
+
+The YAML and JSON files in the ``unified`` sub-directories are platform-independent tests
+that drivers can use to prove their conformance to the RunCommand spec. Tests in the
+``unified`` directory are written using the `Unified Test Format <../../unified-test-format/unified-test-format.md>`_.