diff --git a/test/quic-openssl-docker/hq-interop/quic-hq-interop.c b/test/quic-openssl-docker/hq-interop/quic-hq-interop.c
index bedfeb2bc7..d13ef4e833 100644
--- a/test/quic-openssl-docker/hq-interop/quic-hq-interop.c
+++ b/test/quic-openssl-docker/hq-interop/quic-hq-interop.c
@@ -825,6 +825,9 @@ end:
     SSL_CTX_free(*ctx);
     SSL_free(*ssl);
     BIO_ADDR_free(peer_addr);
+    *ctx = NULL;
+    *ssl = NULL;
+    peer_addr = NULL;
     return 0;
 }