Add temporary cap to openapi-core

This has broken us again :(

Signed-off-by: Stephen Finucane <stephen@that.guru>

diff --git a/requirements-test.txt b/requirements-test.txt
index fd1b0fc44527755cc790da1e879114ca4336a3ca..5f618a5704a6bac60b0b43f7465176ced33c53e1 100644 (file)
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -3,4 +3,5 @@ psycopg2-binary~=2.9.0
 sqlparse~=0.4.0
 python-dateutil~=2.8.0
 tblib~=1.7.0
-openapi-core~=0.16.2
+# FIXME: 0.16.4 has a bug that prevents us accepting null values
+openapi-core==0.16.2