diff --git a/Jenkinsfile b/Jenkinsfile
index 7027d8b..e21779d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -20,10 +20,19 @@ spec:
           - matchExpressions:
               - key: kubernetes.io/hostname
                 operator: NotIn
+                # Storage and quarantined nodes are not build fallback capacity.
                 values:
+                  - titan-04
+                  - titan-05
                   - titan-06
+                  - titan-11
                   - titan-12
+                  - titan-13
                   - titan-14
+                  - titan-15
+                  - titan-17
+                  - titan-18
+                  - titan-19
       preferredDuringSchedulingIgnoredDuringExecution:
         - weight: 100
           preference: