diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 306f4b6..9b01156 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -126,50 +126,50 @@ jobs:
 #      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v3.py node test.js"
 #      env: {"LOCAL": "0", "URL": "http://localhost:8080"}
 
-  "vercel-test":
-    name: "Build and test with Vercel Edge Functions"
-    runs-on: ubuntu-latest
-    env:
-      VERCEL_TOKEN: "${{ secrets.VERCEL_TOKEN }}"
-      VERCEL_PROJECT_NAME: "smoke-test"
-    steps:
-    - name: "Checkout this repo"
-      uses: actions/checkout@v3
-    - name: "Setup Node.js"
-      uses: actions/setup-node@v3
-      with:
-        node-version: "lts/Hydrogen"
-        cache: "npm"
-    - name: "Install npm dependencies"
-      run: "npm ci"
+# "vercel-test":
+#   name: "Build and test with Vercel Edge Functions"
+#   runs-on: ubuntu-latest
+#   env:
+#     VERCEL_TOKEN: "${{ secrets.VERCEL_TOKEN }}"
+#     VERCEL_PROJECT_NAME: "smoke-test"
+#   steps:
+#   - name: "Checkout this repo"
+#     uses: actions/checkout@v3
+#   - name: "Setup Node.js"
+#     uses: actions/setup-node@v3
+#     with:
+#       node-version: "lts/Hydrogen"
+#       cache: "npm"
+#   - name: "Install npm dependencies"
+#     run: "npm ci"
 
-    - name: "Checkout hrana-test-server"
-      uses: actions/checkout@v3
-      with:
-        repository: "libsql/hrana-test-server"
-        path: "hrana-test-server"
-    - name: "Setup Python"
-      uses: actions/setup-python@v4
-      with:
-        python-version: "3.10"
-        cache: "pip"
-    - name: "Install pip dependencies"
-      run: "pip install -r hrana-test-server/requirements.txt"
+#   - name: "Checkout hrana-test-server"
+#     uses: actions/checkout@v3
+#     with:
+#       repository: "libsql/hrana-test-server"
+#       path: "hrana-test-server"
+#   - name: "Setup Python"
+#     uses: actions/setup-python@v4
+#     with:
+#       python-version: "3.10"
+#       cache: "pip"
+#   - name: "Install pip dependencies"
+#     run: "pip install -r hrana-test-server/requirements.txt"
 
-    - name: "Build"
-      run: "npm run build"
-    - name: "Install npm dependencies of the Vercel test"
-      run: "cd smoke_test/vercel && npm install"
+#   - name: "Build"
+#     run: "npm run build"
+#   - name: "Install npm dependencies of the Vercel test"
+#     run: "cd smoke_test/vercel && npm install"
 
-    - name: "Test with Hrana 1 over WebSocket"
-      run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v1.py node test.js"
-      env: {"URL": "ws://localhost:8080"}
-    - name: "Test with Hrana 2 over WebSocket"
-      run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v2.py node test.js"
-      env: {"URL": "ws://localhost:8080"}
-    - name: "Test with Hrana 2 over HTTP"
-      run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v2.py node test.js"
-      env: {"URL": "http://localhost:8080"}
+#   - name: "Test with Hrana 1 over WebSocket"
+#     run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v1.py node test.js"
+#     env: {"URL": "ws://localhost:8080"}
+#   - name: "Test with Hrana 2 over WebSocket"
+#     run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v2.py node test.js"
+#     env: {"URL": "ws://localhost:8080"}
+#   - name: "Test with Hrana 2 over HTTP"
+#     run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v2.py node test.js"
+#     env: {"URL": "http://localhost:8080"}
 #    - name: "Test with Hrana 3 over WebSocket"
 #      run: "cd smoke_test/vercel && python ../../hrana-test-server/server_v3.py node test.js"
 #      env: {"URL": "ws://localhost:8080"}
diff --git a/src/__tests__/client.test.ts b/src/__tests__/client.test.ts
index 0add4b1..a9334c9 100644
--- a/src/__tests__/client.test.ts
+++ b/src/__tests__/client.test.ts
@@ -45,6 +45,19 @@ function withClient(
     };
 }
 
+function withInMemoryClient(
+    f: (c: libsql.Client) => Promise<void>,
+): () => Promise<void> {
+    return async () => {
+        const c = createClient({ url: ":memory:" });
+        try {
+            await f(c);
+        } finally {
+            c.close();
+        }
+    };
+}
+
 describe("createClient()", () => {
     test("URL scheme not supported", () => {
         expect(() => createClient({url: "ftp://localhost"}))
@@ -88,6 +101,10 @@ describe("createClient()", () => {
         // @ts-expect-error
         expect(() => createClient({...config, intMode: "foo"})).toThrow(/"foo"/);
     });
+
+    test("supports in-memory database", () => {
+      expect(() => createClient({url: ":memory:"})).not.toThrow();
+    });
 });
 
 describe("execute()", () => {
@@ -187,6 +204,21 @@ describe("execute()", () => {
         `);
         expect(rs.rowsAffected).toStrictEqual(3);
     }));
+
+    test("query a single value using an in memory database", withInMemoryClient(async (c) => {
+        await c.batch([
+            "DROP TABLE IF EXISTS t",
+            "CREATE TABLE t (a)",
+            "INSERT INTO t VALUES ('one'), ('two')",
+        ], "write");
+        const insertRs = await c.execute("INSERT INTO t VALUES ('three')");
+        expect(insertRs.lastInsertRowid).not.toBeUndefined();
+        const selectRs = await c.execute({
+            sql: "SELECT a FROM t WHERE ROWID = ?",
+            args: [insertRs.lastInsertRowid!],
+        });
+        expect(Array.from(selectRs.rows[0])).toStrictEqual(["three"]);
+    }));
 });
 
 describe("values", () => {
diff --git a/src/config.ts b/src/config.ts
index 32a881d..994c431 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -24,10 +24,32 @@ export function expandConfig(config: Config, preferHttp: boolean): ExpandedConfi
         throw new TypeError(`Expected client configuration as object, got ${typeof config}`);
     }
 
-    const uri = parseUri(config.url);
-
     let tls: boolean | undefined = config.tls;
     let authToken = config.authToken;
+    let syncUrl = config.syncUrl;
+    const intMode = ""+(config.intMode ?? "number");
+    if (intMode !== "number" && intMode !== "bigint" && intMode !== "string") {
+        throw new TypeError(
+            `Invalid value for intMode, expected "number", "bigint" or "string", \
+            got ${JSON.stringify(intMode)}`
+        );
+    }
+
+
+    if(config.url === ':memory:') {
+      return {
+        path: ':memory:',
+        scheme: 'file',
+        syncUrl,
+        intMode,
+        fetch: config.fetch,
+        tls: false,
+        authToken: undefined,
+        authority: undefined,
+      };
+    }
+
+    const uri = parseUri(config.url);
     for (const {key, value} of uri.query?.pairs ?? []) {
         if (key === "authToken") {
             authToken = value ? value : undefined;
@@ -50,7 +72,6 @@ export function expandConfig(config: Config, preferHttp: boolean): ExpandedConfi
             );
         }
     }
-    let syncUrl = config.syncUrl;
 
     const uriScheme = uri.scheme.toLowerCase();
     let scheme: ExpandedScheme;
@@ -87,14 +108,6 @@ export function expandConfig(config: Config, preferHttp: boolean): ExpandedConfi
         );
     }
 
-    const intMode = ""+(config.intMode ?? "number");
-    if (intMode !== "number" && intMode !== "bigint" && intMode !== "string") {
-        throw new TypeError(
-            `Invalid value for intMode, expected "number", "bigint" or "string", \
-            got ${JSON.stringify(intMode)}`
-        );
-    }
-
     return {
         scheme,
         tls: tls ?? true,