diff --git a/gnome/platform/tracker3-miners.xml b/gnome/platform/tracker3-miners.xml
index 6406fcf61a..5c7833a669 100644
--- a/gnome/platform/tracker3-miners.xml
+++ b/gnome/platform/tracker3-miners.xml
@@ -103,8 +103,10 @@
       <xref linkend="upower"/>,
       <ulink url="https://github.com/lipnitsk/libcue">libcue</ulink>,
       <ulink url="http://libiptcdata.sourceforge.net/">libitpcdata</ulink>,
-      <ulink url="https://libosinfo.org">libosinfo</ulink>, and
-      <ulink url="https://gitlab.gnome.org/GNOME/gupnp">gupnp</ulink>
+      <ulink url="https://libosinfo.org">libosinfo</ulink>
+      <ulink url="https://gitlab.gnome.org/GNOME/gupnp">gupnp</ulink>, and
+      <ulink url="https://pypi.python.org/pypi/tap.py/">tap.py</ulink>
+      (for tests)
     </para>
 
     <para condition="html" role="usernotes">
@@ -143,7 +145,8 @@ ninja</userinput></screen>
 
     <para>
       To test the results, as the <systemitem class="username">root</systemitem>
-      user, issue: <command>ninja test</command>.
+      user, issue: <command>ninja test</command>.  38 tests will fail if the
+      Python 3 module tap.py is not installed.
     </para>
 
     <para>
diff --git a/gnome/platform/tracker3.xml b/gnome/platform/tracker3.xml
index 234b6eb72b..07cf5af2a5 100644
--- a/gnome/platform/tracker3.xml
+++ b/gnome/platform/tracker3.xml
@@ -107,8 +107,10 @@
     <para role="optional">
       <xref linkend="asciidoc"/>,
       <xref linkend="gtk-doc"/>,
-      <ulink url="https://github.com/scop/bash-completion/">bash-completion</ulink>, and
-      <ulink url="https://github.com/snowballstem/snowball/">libstemmer</ulink>
+      <ulink url="https://github.com/scop/bash-completion/">bash-completion</ulink>,
+      <ulink url="https://github.com/snowballstem/snowball/">libstemmer</ulink>, and
+      <ulink url="https://pypi.python.org/pypi/tap.py/">tap.py</ulink>
+      (for tests)
       <!-- Python2 used to be a dependency until 2.2.1 -->
     </para>
 
@@ -141,6 +143,7 @@ ninja</userinput></screen>
       To test the results, issue: <command>ninja test</command>. The tests
       should be run from a graphical session. One test,
       <filename>tracker:functional/portal</filename>, is known to timeout.
+      14 tests will fail if the Python 3 module tap.py is not installed.
     </para>
 
     <para>