diff --git a/.gitignore b/.gitignore
index 022ac422..665eab28 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,9 @@ lib/PyLD.egg-info
 profiler
 tests/test_caching.py
 tests/data/test_caching.json
+
+# Local Python version with `pyenv`
+.python-version
+
+# PyCharm & other JetBrains IDEs
+.idea
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..92fcb2e6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,11 @@
+[submodule "specifications/json-ld-api"]
+	path = specifications/json-ld-api
+	url = git@github.com:w3c/json-ld-api.git
+
+[submodule "specifications/json-ld-framing"]
+	path = specifications/json-ld-framing
+	url = git@github.com:w3c/json-ld-framing.git
+
+[submodule "specifications/rdf-dataset-canonicalization"]
+	path = specifications/rdf-dataset-canonicalization
+	url = git@github.com:w3c-ccg/rdf-dataset-canonicalization.git
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..effc1641
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,5 @@
+upgrade-submodules:
+	git submodule update --remote --init --recursive
+
+test:
+	python tests/runtests.py
diff --git a/README.rst b/README.rst
index 978d9774..2cc24857 100644
--- a/README.rst
+++ b/README.rst
@@ -190,16 +190,27 @@ Tests
 This library includes a sample testing utility which may be used to verify
 that changes to the processor maintain the correct output.
 
-To run the sample tests you will need to get the test suite files by cloning
-the ``json-ld-api``, ``json-ld-framing``, and ``normalization`` repositories
-hosted on GitHub:
+To run the sample tests you will need the test suite files provided in the
+``json-ld-api``, ``json-ld-framing``, and ``rdf-dataset-canonicalization``
+repositories hosted
+on GitHub:
 
 - https://github.com/w3c/json-ld-api
 - https://github.com/w3c/json-ld-framing
-- https://github.com/json-ld/normalization
+- https://github.com/w3c-ccg/rdf-dataset-canonicalization
 
-If the suites repositories are available as sibling directories of the PyLD
-source directory, then all the tests can be run with the following:
+They are included beneath ``specifications`` directory of this repository as
+Git submodules. By default, ``git clone`` does
+not retrieve submodules; to download them, please issue the following command:
+
+.. code-block:: bash
+
+    make upgrade-submodules
+
+Issue the same command to update each submodule to the latest available commit.
+
+If the suites repositories are available then all the tests can be run with
+the following:
 
 .. code-block:: bash
 
diff --git a/specifications/json-ld-api b/specifications/json-ld-api
new file mode 160000
index 00000000..229c8236
--- /dev/null
+++ b/specifications/json-ld-api
@@ -0,0 +1 @@
+Subproject commit 229c8236ce88083dc08985609dcab03ca3ae4731
diff --git a/specifications/json-ld-framing b/specifications/json-ld-framing
new file mode 160000
index 00000000..f1392029
--- /dev/null
+++ b/specifications/json-ld-framing
@@ -0,0 +1 @@
+Subproject commit f1392029b39019ae8f69ec81347d4f8b9607f858
diff --git a/specifications/rdf-dataset-canonicalization b/specifications/rdf-dataset-canonicalization
new file mode 160000
index 00000000..fbcfce57
--- /dev/null
+++ b/specifications/rdf-dataset-canonicalization
@@ -0,0 +1 @@
+Subproject commit fbcfce5730bf2726c131a84d06ffb686a190a969
diff --git a/tests/runtests.py b/tests/runtests.py
index 08ed0d34..d98c3d6d 100644
--- a/tests/runtests.py
+++ b/tests/runtests.py
@@ -17,6 +17,8 @@
 import unittest
 import re
 from argparse import ArgumentParser
+from pathlib import Path
+from typing import List
 from unittest import TextTestResult
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'lib'))
@@ -32,9 +34,20 @@
 LOCAL_BASES = [
     'https://w3c.github.io/json-ld-api/tests',
     'https://w3c.github.io/json-ld-framing/tests',
-    'https://github.com/json-ld/normalization/tests'
+    'https://github.com/w3c-ccg/rdf-dataset-canonicalization/tree/main/tests',
 ]
 
+
+def default_test_targets() -> List[Path]:
+    """Default test directories from specifications."""
+    specifications = Path(__file__).parent.parent / 'specifications'
+    return [
+        specifications / 'json-ld-api/tests',
+        specifications / 'json-ld-framing/tests',
+        specifications / 'rdf-dataset-canonicalization/tests',
+    ]
+
+
 class TestRunner(unittest.TextTestRunner):
     """
     Loads test manifests and runs tests.
@@ -95,18 +108,7 @@ def main(self):
             test_targets = self.options.tests
         else:
             # default to find known sibling test dirs
-            test_targets = []
-            sibling_dirs = [
-                '../json-ld-api/tests/',
-                '../json-ld-framing/tests/',
-                '../normalization/tests/',
-            ]
-            for dir in sibling_dirs:
-                if os.path.exists(dir):
-                    print('Test dir found', dir)
-                    test_targets.append(dir)
-                else:
-                    print('Test dir not found', dir)
+            test_targets = default_test_targets()
 
         # ensure a manifest or a directory was specified
         if len(test_targets) == 0: