diff --git a/test/TestCase.php b/test/TestCase.php
index 780e377..51593d8 100644
--- a/test/TestCase.php
+++ b/test/TestCase.php
@@ -28,6 +28,13 @@ class TestCase extends BaseTestCase
      */
     protected $testHost = 'http://localhost:8545';
 
+    /**
+     * coinbase
+     * 
+     * @var string
+     */
+    protected $coinbase;
+
     /**
      * setUp
      * 
@@ -37,6 +44,13 @@ class TestCase extends BaseTestCase
     {
         $web3 = new Web3($this->testHost);
         $this->web3 = $web3;
+
+        $web3->eth->coinbase(function ($err, $coinbase) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $this->coinbase = $coinbase;
+        });
     }
 
     /**
diff --git a/test/unit/EthApiTest.php b/test/unit/EthApiTest.php
index db8c094..0d4cc4b 100644
--- a/test/unit/EthApiTest.php
+++ b/test/unit/EthApiTest.php
@@ -75,7 +75,7 @@ class EthApiTest extends TestCase
             if ($err !== null) {
                 return $this->fail($err->getMessage());
             }
-            $this->assertEquals($coinbase, '0x561a2aa10f9a8589c93665554c871106342f70af');
+            $this->assertEquals($coinbase, $this->coinbase);
         });
     }
 
diff --git a/test/unit/PersonalApiTest.php b/test/unit/PersonalApiTest.php
index 055bbf6..9924b0a 100644
--- a/test/unit/PersonalApiTest.php
+++ b/test/unit/PersonalApiTest.php
@@ -104,19 +104,37 @@ class PersonalApiTest extends TestCase
     {
         $personal = $this->personal;
 
-        $personal->sendTransaction([
-            'from' => "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
-            'to' => "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
-            'gas' => "0x76c0",
-            'gasPrice' => "0x9184e72a000",
-            'value' => "0x9184e72a",
-            'data' => "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"
-        ], '123456', function ($err, $transaction) {
+        // create account
+        $personal->newAccount('123456', function ($err, $account) {
             if ($err !== null) {
-                // infura banned us to use send transaction
-                return $this->assertTrue($err->getCode() === 405);
+                return $this->fail($e->getMessage());
+            }
+            $this->newAccount = $account;
+            $this->assertTrue(is_string($account));
+        });
+
+        $this->web3->eth->sendTransaction([
+            'from' => $this->coinbase,
+            'to' => $this->newAccount,
+            'value' => '0xfffffffff',
+        ], function ($err, $transaction) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
             }
             $this->assertTrue(is_string($transaction));
+            $this->assertTrue(mb_strlen($transaction) === 66);
+        });
+
+        $personal->sendTransaction([
+            'from' => $this->newAccount,
+            'to' => $this->coinbase,
+            'value' => '0x01',
+        ], '123456', function ($err, $transaction) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $this->assertTrue(is_string($transaction));
+            $this->assertTrue(mb_strlen($transaction) === 66);
         });
     }