diff --git a/pylib/cassandra-cqlsh-tests.sh b/pylib/cassandra-cqlsh-tests.sh
index bfc5c979e9..35d759bf8a 100755
--- a/pylib/cassandra-cqlsh-tests.sh
+++ b/pylib/cassandra-cqlsh-tests.sh
@@ -59,6 +59,7 @@ if [ "$CASSANDRA_USE_JDK11" = true ] ; then
     TESTSUITE_NAME="${TESTSUITE_NAME}.jdk11"
 else
     TESTSUITE_NAME="${TESTSUITE_NAME}.jdk8"
+    unset JAVA11_HOME
 fi
 
 ant -buildfile ${CASSANDRA_DIR}/build.xml realclean