diff --git a/services/core/java/com/android/server/net/IpConfigStore.java b/services/core/java/com/android/server/net/IpConfigStore.java
index 90e26d8488..9f1435acd4 100644
--- a/services/core/java/com/android/server/net/IpConfigStore.java
+++ b/services/core/java/com/android/server/net/IpConfigStore.java
@@ -59,8 +59,12 @@ public class IpConfigStore {
 
     protected static final int IPCONFIG_FILE_VERSION = 2;
 
+    public IpConfigStore(DelayedDiskWrite writer) {
+        mWriter = writer;
+    }
+
     public IpConfigStore() {
-        mWriter = new DelayedDiskWrite();
+        this(new DelayedDiskWrite());
     }
 
     private boolean writeConfig(DataOutputStream out, int configKey,