diff --git a/Doc/license.rst b/Doc/license.rst
index a315b6f8134..d3733f53a11 100644
--- a/Doc/license.rst
+++ b/Doc/license.rst
@@ -913,3 +913,40 @@ library unless the build is configured ``--with-system-libmpdec``::
    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    SUCH DAMAGE.
+
+
+W3C C14N test suite
+-------------------
+
+The C14N 2.0 test suite in the :mod:`test` package
+(``Lib/test/xmltestdata/c14n-20/``) was retrieved from the W3C website at
+https://www.w3.org/TR/xml-c14n2-testcases/ and is distributed under the
+3-clause BSD license:
+
+   Copyright (c) 2013 W3C(R) (MIT, ERCIM, Keio, Beihang),
+   All Rights Reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   * Redistributions of works must retain the original copyright notice,
+     this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the original copyright
+     notice, this list of conditions and the following disclaimer in the
+     documentation and/or other materials provided with the distribution.
+   * Neither the name of the W3C nor the names of its contributors may be
+     used to endorse or promote products derived from this work without
+     specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Lib/test/xmltestdata/c14n-20/README b/Lib/test/xmltestdata/c14n-20/README
index 06e63704542..45e75b9bd98 100644
--- a/Lib/test/xmltestdata/c14n-20/README
+++ b/Lib/test/xmltestdata/c14n-20/README
@@ -9,6 +9,32 @@ Direct source:
 https://www.w3.org/TR/xml-c14n2-testcases/files/
 
 Copied and distributed under these terms:
+https://www.w3.org/Consortium/Legal/2008/04-testsuite-copyright.html
 
 Copyright © 2013 W3C® (MIT, ERCIM, Keio, Beihang),
-http://www.w3.org/Consortium/Legal/2015/doc-license
+All Rights Reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+* Redistributions of works must retain the original copyright notice,
+  this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the original copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+* Neither the name of the W3C nor the names of its contributors may be
+  used to endorse or promote products derived from this work without
+  specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.