diff --git a/requirements.txt b/requirements.txt
index 54c2b2ed5fe9c2f2c145af6837aba9a72a129d96..aa61d0d3d00e5e7d04e15feaf7045633123ae177 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,12 @@
 # Pinned version of all dependencies, direct and transitive, needed at
 # runtime.  This is the configuration tested on CI.
+attrs==19.1.0
+Automat==0.7.0
+constantly==15.1.0
+hyperlink==19.0.0
+idna==2.8
+incremental==17.5.0
+PyHamcrest==1.9.0
+six==1.12.0
+Twisted==19.2.1
+zope.interface==4.6.0
diff --git a/src/_secureaccesstokenauthorizer/tests/test_tokens.py b/src/_secureaccesstokenauthorizer/tests/test_tokens.py
new file mode 100644
index 0000000000000000000000000000000000000000..19519e70dfbc5465bacc45f278e2cb79b1fc40ba
--- /dev/null
+++ b/src/_secureaccesstokenauthorizer/tests/test_tokens.py
@@ -0,0 +1,17 @@
+# Copyright 2019 PrivateStorage.io, LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Some tests for some tokens, perhaps.  Just a stub for now.
+"""