diff --git a/lower-constraints.txt b/lower-constraints.txt
index 7d269c52c5..5d284cbdd3 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -170,7 +170,7 @@ voluptuous==0.11.1
 waitress==1.1.0
 warlock==1.3.1
 WebOb==1.8.2
-WebTest==2.0.29
+WebTest==2.0.26
 Werkzeug==0.14.1
 wrapt==1.12.0
 WSME==0.8.0
diff --git a/test-requirements.txt b/test-requirements.txt
index a4e7a9baa7..051ebbdf3f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,3 +19,4 @@ tempest>=23.0.0 # Apache-2.0
 # Required for pep8 - doc8 tests
 sphinx>=2.0.0,!=2.1.0 # BSD
 bashate>=0.5.1 # Apache-2.0
+WebTest>=2.0.26 # MIT