diff --git a/packages/tests/src/nwaku.ts b/packages/tests/src/nwaku.ts
index d3e9e3f9d9..e366e48b50 100644
--- a/packages/tests/src/nwaku.ts
+++ b/packages/tests/src/nwaku.ts
@@ -47,6 +47,7 @@ export interface Args {
   lightpush?: boolean;
   filter?: boolean;
   store?: boolean;
+  storeMessageDbUrl?: string;
   topics?: string;
   rpcPrivate?: boolean;
   websocketSupport?: boolean;
@@ -422,7 +423,7 @@ export function argsToArray(args: Args): Array<string> {
 
   for (const [key, value] of Object.entries(args)) {
     // Change the key from camelCase to kebab-case
-    const kebabKey = key.replace(/([A-Z])/, (_, capital) => {
+    const kebabKey = key.replace(/([A-Z])/g, (_, capital) => {
       return "-" + capital.toLowerCase();
     });
 
@@ -441,6 +442,7 @@ export function defaultArgs(): Args {
     rpc: true,
     rpcAdmin: true,
     websocketSupport: true,
+    storeMessageDbUrl: "sqlite://:memory:",
     logLevel: LogLevel.Debug,
   };
 }
diff --git a/packages/tests/tests/nwaku.node.spec.ts b/packages/tests/tests/nwaku.node.spec.ts
index 5299aab3f6..b1602bb2da 100644
--- a/packages/tests/tests/nwaku.node.spec.ts
+++ b/packages/tests/tests/nwaku.node.spec.ts
@@ -16,6 +16,7 @@ describe("nwaku", () => {
       "--rpc=true",
       "--rpc-admin=true",
       "--websocket-support=true",
+      "--store-message-db-url=sqlite://:memory:",
       "--log-level=DEBUG",
       "--ports-shift=42",
     ];