diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -116,7 +116,6 @@ test_requirements = [
     'cssselect',
     'flake8',
     'lxml',
-    'locustio',
     'mock',
     'pytest',
     'pytest-cov',
diff --git a/shell.nix b/shell.nix
--- a/shell.nix
+++ b/shell.nix
@@ -45,7 +45,6 @@ in enterprise.override (attrs: {
       bumpversion
       invoke
       ipdb
-      locustio
     ]);
 
   shellHook = attrs.shellHook +