diff --git a/cpp/DBHostObject.cpp b/cpp/DBHostObject.cpp
index cc32a83..57a4665 100644
--- a/cpp/DBHostObject.cpp
+++ b/cpp/DBHostObject.cpp
@@ -238,6 +238,8 @@ void DBHostObject::create_jsi_functions() {
   });
 
   function_map["close"] = HOSTFN("close") {
+    invalidated = true;
+    
 #ifdef OP_SQLITE_USE_LIBSQL
     opsqlite_libsql_close(db);
 #else
@@ -248,6 +250,8 @@ void DBHostObject::create_jsi_functions() {
   });
 
   function_map["delete"] = HOSTFN("delete") {
+    invalidated = true;
+    
     std::string path = std::string(base_path);
 
     if (count == 1) {
@@ -808,6 +812,10 @@ void DBHostObject::set(jsi::Runtime &_rt, const jsi::PropNameID &name,
 }
 
 void DBHostObject::invalidate() {
+  if(invalidated) {
+    return;
+  }
+  
   invalidated = true;
   _thread_pool->restartPool();
 #ifdef OP_SQLITE_USE_LIBSQL
diff --git a/example/src/tests/dbsetup.spec.ts b/example/src/tests/dbsetup.spec.ts
index 734b838..4750f3d 100644
--- a/example/src/tests/dbsetup.spec.ts
+++ b/example/src/tests/dbsetup.spec.ts
@@ -82,10 +82,26 @@ export function dbSetupTests() {
           'CREATE TABLE User ( id INT PRIMARY KEY, name TEXT NOT NULL, age INT, networth REAL) STRICT;',
         );
 
-        await androidDb.close();
+        androidDb.close();
+      });
+
+      it('Creates db in external nested directory on Android', async () => {
+        let androidDb = open({
+          name: 'AndroidSDCardDB.sqlite',
+          location: `${ANDROID_EXTERNAL_FILES_PATH}/nested`,
+          encryptionKey: 'test',
+        });
+
+        await androidDb.execute('DROP TABLE IF EXISTS User;');
+        await androidDb.execute(
+          'CREATE TABLE User ( id INT PRIMARY KEY, name TEXT NOT NULL, age INT, networth REAL) STRICT;',
+        );
+
+        androidDb.close();
       });
     }
 
+    // Currently this only tests the function is there
     it('Should load extension', async () => {
       let db = open({
         name: 'extensionDb',
@@ -112,13 +128,16 @@ export function dbSetupTests() {
     });
 
     it('Should delete db with absolute path', async () => {
+      let location =
+        Platform.OS === 'ios' ? IOS_LIBRARY_PATH : ANDROID_DATABASE_PATH;
       let db = open({
         name: 'deleteTest',
         encryptionKey: 'test',
-        location:
-          Platform.OS === 'ios' ? IOS_LIBRARY_PATH : ANDROID_DATABASE_PATH,
+        location,
       });
 
+      expect(db.getDbPath()).to.contain(location);
+
       db.delete();
     });
 
@@ -129,6 +148,20 @@ export function dbSetupTests() {
         location: 'myFolder',
       });
 
+      let path = db.getDbPath();
+      expect(path).to.contain('myFolder');
+      db.delete();
+    });
+
+    it('Should create nested folders', async () => {
+      let db = open({
+        name: 'nestedFolderTest.sqlite',
+        encryptionKey: 'test',
+        location: 'myFolder/nested',
+      });
+
+      let path = db.getDbPath();
+      expect(path).to.contain('myFolder/nested');
       db.delete();
     });
 
@@ -155,18 +188,17 @@ export function dbSetupTests() {
       });
 
       expect(copied).to.equal(true);
-    });
 
-    // it('Should fail creating in-memory with non-bool arg', async () => {
-    //   try {
-    //     open({
-    //       name: 'inMemoryTest',
-    //     });
-    //     expect.fail('Should throw');
-    //   } catch (e) {
-    //     expect(!!e).to.equal(true);
-    //   }
-    // });
+      let db = open({
+        name: 'sample2.sqlite',
+        encryptionKey: 'test',
+        location: 'sqlite',
+      });
+
+      let path = db.getDbPath();
+      expect(path).to.contain('sqlite/sample2.sqlite');
+      db.delete();
+    });
 
     it('Creates new connections per query and closes them', async () => {
       for (let i = 0; i < 100; i++) {
@@ -235,10 +267,11 @@ export function dbSetupTests() {
   });
 
   if (isSQLCipher()) {
-    it('Can open without encryption key', () => {
+    it('Can open SQLCipher db without encryption key', () => {
       let db = open({
         name: 'pathTest.sqlite',
       });
+
       db.close();
     });
   }
diff --git a/example/src/tests/queries.spec.ts b/example/src/tests/queries.spec.ts
index 77de95a..17913ef 100644
--- a/example/src/tests/queries.spec.ts
+++ b/example/src/tests/queries.spec.ts
@@ -238,9 +238,6 @@ export function queriesTests() {
 
       const countRes = await db.execute('SELECT COUNT(*) as count FROM User');
 
-      // console.log(countRes);
-
-      // expect(countRes.metadata?.[0]?.type).to.equal('UNKNOWN');
       expect(countRes.rows?.length).to.equal(1);
       expect(countRes.rows?.[0]?.count).to.equal(1);
 
@@ -257,18 +254,14 @@ export function queriesTests() {
 
       const sumRes = await db.execute('SELECT SUM(age) as sum FROM User;');
 
-      // expect(sumRes.metadata?.[0]?.type).to.equal('UNKNOWN');
       expect(sumRes.rows[0]!.sum).to.equal(age + age2);
 
-      // MAX(networth), MIN(networth)
       const maxRes = await db.execute(
         'SELECT MAX(networth) as `max` FROM User;',
       );
       const minRes = await db.execute(
         'SELECT MIN(networth) as `min` FROM User;',
       );
-      // expect(maxRes.metadata?.[0]?.type).to.equal('UNKNOWN');
-      // expect(minRes.metadata?.[0]?.type).to.equal('UNKNOWN');
       const maxNetworth = Math.max(networth, networth2);
       const minNetworth = Math.min(networth, networth2);
 
@@ -707,6 +700,32 @@ export function queriesTests() {
       await db.execute('SELECT ?; ', [1]);
     });
 
+    it('Handles concurrent transactions correctly', async () => {
+      const id = chance.integer();
+      const name = chance.name();
+      const age = chance.integer();
+      const networth = chance.floating();
+
+      const transaction1 = db.transaction(async tx => {
+        await tx.execute(
+          'INSERT INTO "User" (id, name, age, networth) VALUES(?, ?, ?, ?)',
+          [id, name, age, networth],
+        );
+      });
+
+      const transaction2 = db.transaction(async tx => {
+        await tx.execute(
+          'INSERT INTO "User" (id, name, age, networth) VALUES(?, ?, ?, ?)',
+          [id + 1, name, age, networth],
+        );
+      });
+
+      await Promise.all([transaction1, transaction2]);
+
+      const res = await db.execute('SELECT * FROM User');
+      expect(res.rows.length).to.equal(2);
+    });
+
     it('Pragma user_version', () => {
       const res = db.executeSync('PRAGMA user_version');
       console.warn(res.rows);