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-rw-r--r--docs/internals/contributing/writing-code/unit-tests.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/docs/internals/contributing/writing-code/unit-tests.txt b/docs/internals/contributing/writing-code/unit-tests.txt
index 1eea23500d..f964999213 100644
--- a/docs/internals/contributing/writing-code/unit-tests.txt
+++ b/docs/internals/contributing/writing-code/unit-tests.txt
@@ -165,6 +165,11 @@ like so::
$ pip install -r tests/requirements/py3.txt # Python 2: py2.txt
+If you encounter an error during the installation, your system might be missing
+a dependency for one or more of the Python packages. Consult the failing
+package's documentation or search the Web with the error message that you
+encounter.
+
You can also install the database adapter(s) of your choice using
``oracle.txt``, ``mysql.txt``, or ``postgres.txt``.