diff --git a/docker-compose.yml b/docker-compose.yml
index 496d7aa..93664f0 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -41,7 +41,6 @@ services:
       - SSLKEYLOGFILE=/logs/keys.log
       - QLOGDIR=/logs/qlog/
       - TESTCASE=$TESTCASE_SERVER
-      - VERSION=$VERSION
     depends_on:
       - sim
     cap_add: 
@@ -70,7 +69,6 @@ services:
       - QLOGDIR=/logs/qlog/
       - TESTCASE=$TESTCASE_CLIENT
       - REQUESTS=$REQUESTS
-      - VERSION=$VERSION
     depends_on:
       - sim
     cap_add: 
diff --git a/empty.env b/empty.env
index 2957dc8..df70fab 100644
--- a/empty.env
+++ b/empty.env
@@ -10,6 +10,5 @@ SERVER_PARAMS=""
 SSLKEYLOGFILE=""
 TESTCASE_CLIENT=""
 TESTCASE_SERVER=""
-VERSION=""
 WWW=""
 WAITFORSERVER=""
diff --git a/interop.py b/interop.py
index b571813..41fd699 100644
--- a/interop.py
+++ b/interop.py
@@ -414,7 +414,6 @@ def _run_test(
             "CLIENT=" + self._implementations[client]["image"] + " "
             "SERVER=" + self._implementations[server]["image"] + " "
             'REQUESTS="' + reqs + '" '
-            'VERSION="' + testcases.QUIC_VERSION + '" '
         ).format(testcase.scenario())
         params += " ".join(testcase.additional_envs())
         containers = "sim client server " + " ".join(testcase.additional_containers())