diff --git a/Build/Scripts/runTests.sh b/Build/Scripts/runTests.sh
index 6179a57..ec39045 100755
--- a/Build/Scripts/runTests.sh
+++ b/Build/Scripts/runTests.sh
@@ -499,13 +499,13 @@ case ${TEST_SUITE} in
         cleanTestFiles
         ;;
     composer)
-        COMMAND="composer $*"
-        ${CONTAINER_BIN} run ${CONTAINER_COMMON_PARAMS} --name composer-command-${SUFFIX} -e COMPOSER_CACHE_DIR=.cache/composer -e COMPOSER_ROOT_VERSION=${COMPOSER_ROOT_VERSION} ${IMAGE_PHP} /bin/sh -c "${COMMAND}"
+        COMMAND=(composer "$@")
+        ${CONTAINER_BIN} run ${CONTAINER_COMMON_PARAMS} --name composer-command-${SUFFIX} -e COMPOSER_CACHE_DIR=.cache/composer -e COMPOSER_ROOT_VERSION=${COMPOSER_ROOT_VERSION} ${IMAGE_PHP} "${COMMAND[@]}"
         SUITE_EXIT_CODE=$?
         ;;
     composerInstall)
-        COMMAND="composer install $*"
-        ${CONTAINER_BIN} run ${CONTAINER_COMMON_PARAMS} --name composer-install-${SUFFIX} -e COMPOSER_CACHE_DIR=.cache/composer -e COMPOSER_ROOT_VERSION=${COMPOSER_ROOT_VERSION} ${IMAGE_PHP} /bin/sh -c "${COMMAND}"
+        COMMAND=(composer install "$@")
+        ${CONTAINER_BIN} run ${CONTAINER_COMMON_PARAMS} --name composer-install-${SUFFIX} -e COMPOSER_CACHE_DIR=.cache/composer -e COMPOSER_ROOT_VERSION=${COMPOSER_ROOT_VERSION} ${IMAGE_PHP} "${COMMAND[@]}"
         SUITE_EXIT_CODE=$?
         ;;
     composerInstallMax)