diff --git a/apps/api/src/__tests__/mocks/db.ts b/apps/api/src/__tests__/mocks/db.ts
new file mode 100644
index 0000000..79127eb
--- /dev/null
+++ b/apps/api/src/__tests__/mocks/db.ts
@@ -0,0 +1,131 @@
+import { vi } from "vitest";
+
+export const mockRows: Record<string, unknown[]> = {};
+
+export function resetMock() {
+  Object.keys(mockRows).forEach((key) => {
+    mockRows[key] = [];
+  });
+}
+
+function makeChainable(data: unknown[]): unknown {
+  const arr = [...data];
+  const chain = new Proxy(arr, {
+    get(target, prop) {
+      if (
+        prop === "where" ||
+        prop === "orderBy" ||
+        prop === "limit" ||
+        prop === "leftJoin" ||
+        prop === "rightJoin" ||
+        prop === "innerJoin"
+      ) {
+        return () => chain;
+      }
+      return target[prop as keyof typeof target];
+    },
+  });
+  return chain;
+}
+
+function createTableProxy(tableName: string): unknown {
+  return new Proxy(
+    { _name: tableName },
+    {
+      get: (target, prop) =>
+        prop === "_name" ? tableName : { table: tableName, column: prop },
+    }
+  );
+}
+
+const tables = [
+  "user",
+  "session",
+  "account",
+  "verification",
+  "clients",
+  "pets",
+  "services",
+  "staff",
+  "recurringSeries",
+  "appointmentGroups",
+  "appointments",
+  "invoices",
+  "invoiceLineItems",
+  "invoiceTipSplits",
+  "refunds",
+  "reminderLogs",
+  "impersonationSessions",
+  "impersonationAuditLogs",
+  "conversations",
+  "messages",
+  "messageAttachments",
+  "messageConsentEvents",
+  "businessSettings",
+  "groomingVisitLogs",
+  "waitlistEntries",
+  "authProviderConfig",
+] as const;
+
+type TableName = (typeof tables)[number];
+
+const tableProxies: Record<TableName, unknown> = {} as Record<TableName, unknown>;
+
+tables.forEach((table) => {
+  tableProxies[table] = createTableProxy(table);
+});
+
+vi.mock("@groombook/db", () => ({
+  getDb: () => ({
+    select: () => ({
+      from: (table: { _name: string }) => {
+        const tableName = table._name as TableName;
+        const rows = mockRows[tableName] || [];
+        return makeChainable(rows);
+      },
+    }),
+    insert: () => ({
+      values: (vals: Record<string, unknown>) => ({
+        returning: () => [{ ...vals, id: "mock-id" }],
+      }),
+    }),
+    update: () => ({
+      set: (vals: Record<string, unknown>) => ({
+        where: () => ({
+          returning: () => [{ ...vals, id: "mock-id" }],
+        }),
+      }),
+    }),
+    delete: () => ({
+      where: () => ({
+        returning: () => [{ id: "mock-id" }],
+      }),
+    }),
+  }),
+  ...tableProxies,
+  eq: vi.fn(),
+  and: vi.fn(),
+  or: vi.fn(),
+  ne: vi.fn(),
+  gt: vi.fn(),
+  gte: vi.fn(),
+  lt: vi.fn(),
+  lte: vi.fn(),
+  inArray: vi.fn(),
+  isNull: vi.fn(),
+  ilike: vi.fn(),
+  sql: vi.fn(),
+  exists: vi.fn(),
+  desc: vi.fn(),
+  asc: vi.fn(),
+  encryptSecret: vi.fn(),
+  decryptSecret: vi.fn(),
+  appointmentStatusEnum: ["scheduled", "confirmed", "in_progress", "completed", "cancelled", "no_show"],
+  staffRoleEnum: ["groomer", "receptionist", "manager"],
+  invoiceStatusEnum: ["draft", "pending", "paid", "void"],
+  paymentMethodEnum: ["cash", "card", "check", "other"],
+  clientStatusEnum: ["active", "disabled"],
+  messagingChannelEnum: ["sms", "mms"],
+  messageDirectionEnum: ["inbound", "outbound"],
+  messageStatusEnum: ["queued", "sent", "delivered", "failed"],
+}));
diff --git a/apps/api/src/__tests__/waitlist.test.ts b/apps/api/src/__tests__/waitlist.test.ts
index 383bc80..b9b3421 100644
--- a/apps/api/src/__tests__/waitlist.test.ts
+++ b/apps/api/src/__tests__/waitlist.test.ts
@@ -41,12 +41,14 @@ let selectRows: Record<string, unknown>[] = [];
 let selectSessionRow: Record<string, unknown> | null = null;
 let insertedValues: Record<string, unknown>[] = [];
 let updatedValues: Record<string, unknown>[] = [];
+let insertedAuditLogs: Record<string, unknown>[] = [];
 
 function resetMock() {
   selectRows = [];
   selectSessionRow = null;
   insertedValues = [];
   updatedValues = [];
+  insertedAuditLogs = [];
 }
 
 vi.mock("@groombook/db", () => {
@@ -94,6 +96,11 @@ vi.mock("@groombook/db", () => {
     { get: (t, p) => (p === "_name" ? "appointments" : { table: "appointments", column: p }) }
   );
 
+  const impersonationAuditLogs = new Proxy(
+    { _name: "impersonationAuditLogs" },
+    { get: (t, p) => (p === "_name" ? "impersonationAuditLogs" : { table: "impersonationAuditLogs", column: p }) }
+  );
+
   return {
     getDb: () => ({
       select: () => ({
@@ -109,9 +116,18 @@ vi.mock("@groombook/db", () => {
       }),
       insert: () => ({
         values: (vals: Record<string, unknown>) => {
-          insertedValues.push(vals);
+          // Only count waitlist entry inserts, not audit log inserts from portalAudit middleware
+          if (vals.petId || vals.serviceId || vals.status !== undefined) {
+            insertedValues.push(vals);
+          }
           return {
-            returning: () => [{ ...WAITLIST_ENTRY, ...vals, id: "waitlist-uuid-new" }],
+            returning: () => {
+              if (vals.sessionId && !vals.petId) {
+                insertedAuditLogs.push(vals);
+                return [{ ...vals, id: "audit-log-uuid", createdAt: new Date() }];
+              }
+              return [{ ...WAITLIST_ENTRY, ...vals, id: "waitlist-uuid-new" }];
+            },
           };
         },
       }),
@@ -139,6 +155,7 @@ vi.mock("@groombook/db", () => {
     }),
     waitlistEntries,
     impersonationSessions,
+    impersonationAuditLogs,
     clients,
     pets,
     services,