diff --git a/cms/envs/devstack.py b/cms/envs/devstack.py
index 5e371e6315..5ce4b132cd 100644
--- a/cms/envs/devstack.py
+++ b/cms/envs/devstack.py
@@ -241,5 +241,10 @@ CORS_ALLOW_HEADERS = corsheaders_default_headers + (
 FEATURES['ENABLE_SPECIAL_EXAMS'] = True
 FEATURES['ENABLE_PREREQUISITE_COURSES'] = True
 
+# Used in edx-proctoring for ID generation in lieu of SECRET_KEY - dummy value
+# (ref MST-637)
+PROCTORING_USER_OBFUSCATION_KEY = '85920908f28904ed733fe576320db18cabd7b6cd'
+
+
 # Don't tolerate deprecated edx-platform import usage in devstack.
 ERROR_ON_DEPRECATED_EDX_PLATFORM_IMPORTS = True
diff --git a/cms/envs/test.py b/cms/envs/test.py
index 9d99251684..aa534dacf0 100644
--- a/cms/envs/test.py
+++ b/cms/envs/test.py
@@ -321,6 +321,10 @@ DEFAULT_MOBILE_AVAILABLE = True
 
 PROCTORING_SETTINGS = {}
 
+# Used in edx-proctoring for ID generation in lieu of SECRET_KEY - dummy value
+# (ref MST-637)
+PROCTORING_USER_OBFUSCATION_KEY = '85920908f28904ed733fe576320db18cabd7b6cd'
+
 ##### LOGISTRATION RATE LIMIT SETTINGS #####
 LOGISTRATION_RATELIMIT_RATE = '5/5m'
 LOGISTRATION_API_RATELIMIT = '5/m'
diff --git a/lms/envs/devstack.py b/lms/envs/devstack.py
index e33a17d4fa..f34dc185a2 100644
--- a/lms/envs/devstack.py
+++ b/lms/envs/devstack.py
@@ -432,9 +432,10 @@ if os.path.isfile(join(dirname(abspath(__file__)), 'private.py')):
 FEATURES['ENABLE_SPECIAL_EXAMS'] = True
 FEATURES['ENABLE_PREREQUISITE_COURSES'] = True
 
-# Don't tolerate deprecated edx-platform import usage in devstack.
-ERROR_ON_DEPRECATED_EDX_PLATFORM_IMPORTS = True
-
 # Used in edx-proctoring for ID generation in lieu of SECRET_KEY - dummy value
 # (ref MST-637)
 PROCTORING_USER_OBFUSCATION_KEY = '85920908f28904ed733fe576320db18cabd7b6cd'
+
+
+# Don't tolerate deprecated edx-platform import usage in devstack.
+ERROR_ON_DEPRECATED_EDX_PLATFORM_IMPORTS = True