diff --git a/server/CONTRIBUTING.md b/server/CONTRIBUTING.md
index 959dff15e66..98dc0739a7b 100644
--- a/server/CONTRIBUTING.md
+++ b/server/CONTRIBUTING.md
@@ -73,7 +73,7 @@ You can run the test suite with:
 
     $ scripts/dev.sh test
 
-This should run in isolation.
+This should run in isolation.  The output format is described in the [pytest documentation](https://docs.pytest.org/en/latest/usage.html#detailed-summary-report).  Errors and failures are indicated by `F`s and `E`s.
 
 ### Run and test manually
 
diff --git a/server/tests-py/README.md b/server/tests-py/README.md
index 248788019be..d75a7525c8d 100644
--- a/server/tests-py/README.md
+++ b/server/tests-py/README.md
@@ -4,7 +4,7 @@ The easiest way to run the test suite is to do:
 
     $ scripts/dev.sh test
 
-This should install python dependencies if required, and run in isolation.
+This should install python dependencies if required, and run in isolation.  The output format is described in the [pytest documentation](https://docs.pytest.org/en/latest/usage.html#detailed-summary-report).  Errors and failures are indicated by `F`s and `E`s.
 
 ## Tests Structure