diff --git a/pysat/constellations/single_test.py b/pysat/constellations/single_test.py
index <HASH>..<HASH> 100644
--- a/pysat/constellations/single_test.py
+++ b/pysat/constellations/single_test.py
@@ -1,5 +1,11 @@
 """
 Create a constellation with one testing instrument
+
+Attributes
+----------
+instruments : list
+    List of pysat.Instrument objects
+
 """
 
 import pysat
diff --git a/pysat/constellations/testing.py b/pysat/constellations/testing.py
index <HASH>..<HASH> 100644
--- a/pysat/constellations/testing.py
+++ b/pysat/constellations/testing.py
@@ -1,5 +1,11 @@
 """
 Creates a constellation with 5 testing instruments
+
+Attributes
+----------
+instruments : list
+    List of pysat.Instrument objects
+
 """
 import pysat
 
diff --git a/pysat/constellations/testing_empty.py b/pysat/constellations/testing_empty.py
index <HASH>..<HASH> 100644
--- a/pysat/constellations/testing_empty.py
+++ b/pysat/constellations/testing_empty.py
@@ -1,5 +1,11 @@
 """
 Creates an empty constellation for testing
+
+Attributes
+----------
+instruments : list
+    List of pysat.Instrument objects
+
 """
 
 instruments = []
DOC: updated docstrings

Updated constellation testing docstrings.