diff --git a/bin/test-image b/bin/test-image
index 47648405a..db4f22bf0 100755
--- a/bin/test-image
+++ b/bin/test-image
@@ -152,9 +152,15 @@ done
 echo "==> Waiting for instances to start"
 for i in ${INSTANCES}; do
     if [ "${DIST}" == "busybox" ]; then
+        # Busybox has only 1 process running when ready.
         MIN_PROC_COUNT=1
     fi
 
+    if [ "${DIST}" == "centos" ]; then
+        # Give CentOS a bit more time to boot.
+        MAX_WAIT_SECONDS=180
+    fi
+
     waitInstanceReady "${i}"
 done