diff --git a/INSTALL b/INSTALL
index e31431bfbe..36cb090090 100644
--- a/INSTALL
+++ b/INSTALL
@@ -314,7 +314,8 @@
                    Enable building of integration with external test suites.
                    This is a developer option and may not work on all platforms.
                    The only supported external test suite at the current time is
-                   the BoringSSL test suite.
+                   the BoringSSL test suite. See the file test/README.external
+                   for further details.
 
   no-filenames
                    Don't compile in filename and line number information (e.g.
diff --git a/test/README.external b/test/README.external
new file mode 100644
index 0000000000..68d84813bb
--- /dev/null
+++ b/test/README.external
@@ -0,0 +1,65 @@
+Running the BoringSSL test suite with OpenSSL
+=============================================
+
+It is possible to integrate external test suites into OpenSSL's "make test". At
+the current time the only supported external suite is the one used by
+BoringSSL.
+
+This capability is considered a developer option and may not work on all
+platforms.
+
+In order to run the BoringSSL tests with OpenSSL, first checkout the BoringSSL
+source code into an appropriate directory:
+
+$ git clone boringssl https://boringssl.googlesource.com/boringssl
+
+The BoringSSL tests are only confirmed to work at a specific commit in the
+BoringSSL repository. Later commits may or may not pass the test suite:
+
+$ cd boringssl
+$ git checkout 490469f850e
+
+From the OpenSSL source code configure to use the external tests:
+
+$ cd ../openssl
+$ ./config enable-ssl3 enable-ssl3-method enable-weak-ssl-ciphers \
+  enable-external-tests
+
+Note that using other config option than those given above may cause the tests
+to fail.
+
+Run the OpenSSL tests by providing the path to the BoringSSL test runner in the
+BORING_RUNNER_DIR environment variable:
+
+$ BORING_RUNNER_DIR=/path/to/boringssl/ssl/test/runner make test
+
+Note that the test suite may change directory while running so the path provided
+should be absolute and not relative to the current working directory.
+
+To see more detailed output you can run just the BoringSSL tests with the
+verbose option:
+
+$ VERBOSE=1 BORING_RUNNER_DIR=/path/to/boringssl/ssl/test/runner make \
+  TESTS="test_external" test
+
+
+Test failures and suppressions
+==============================
+
+A large number of the BoringSSL tests are known to fail. A test could fail
+because of many possible reasons. For example:
+
+- A bug in OpenSSL
+- Different interpretations of standards
+- Assumptions about the way BoringSSL works that do not apply to OpenSSL
+- The test uses APIs added to BoringSSL that are not present in OpenSSL
+- etc
+
+In order to provide a "clean" baseline run with all the tests passing a config
+file has been provided that suppresses the running of tests that are known to
+fail. These suppressions are held in the file "test/ossl_shim/ossl_config.json"
+within the OpenSSL source code.
+
+The community is encouraged to contribute patches which reduce the number of
+suppressions that are currently present.
+