diff --git a/java/grpc-client/src/test/resources/ca.config b/java/grpc-client/src/test/resources/ca.config
index e0955f28ccf..c5758831e06 100644
--- a/java/grpc-client/src/test/resources/ca.config
+++ b/java/grpc-client/src/test/resources/ca.config
@@ -2,6 +2,7 @@
  default_bits           = 1024
  default_keyfile        = keyfile.pem
  distinguished_name     = req_distinguished_name
+ x509_extensions        = v3_ca
  attributes             = req_attributes
  prompt                 = no
  output_password        = mypass
@@ -15,3 +16,5 @@
  emailAddress           = test@email.address
 [ req_attributes ]
  challengePassword      = A challenge password
+[ v3_ca ]
+ basicConstraints       = CA:TRUE