diff --git a/test/unit/ShhFilterValidatorTest.php b/test/unit/ShhFilterValidatorTest.php
new file mode 100644
index 0000000..5e8c042
--- /dev/null
+++ b/test/unit/ShhFilterValidatorTest.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace Test\Unit;
+
+use Test\TestCase;
+use Web3\Validators\ShhFilterValidator;
+
+class ShhFilterValidatorTest extends TestCase
+{
+    /**
+     * validator
+     * 
+     * @var \Web3\Validators\ShhFilterValidator
+     */
+    protected $validator;
+
+    /**
+     * setUp
+     * 
+     * @return void
+     */
+    public function setUp()
+    {
+        parent::setUp();
+        $this->validator = new ShhFilterValidator;
+    }
+
+    /**
+     * testValidate
+     * 
+     * @return void
+     */
+    public function testValidate()
+    {
+        $validator = $this->validator;
+
+        $this->assertEquals(false, $validator->validate('hello web3.php'));
+        $this->assertEquals(false, $validator->validate([]));
+        $this->assertEquals(false, $validator->validate([
+            'to' => 'hello',
+        ]));
+        $this->assertEquals(false, $validator->validate([
+            'to' => '0xeb0b54D62ec3f561C2eebdaebd92432126F0817579c102b062d1a6c1f2ed83e8121233',
+        ]));
+        $this->assertEquals(false, $validator->validate([
+            'to' => '0xeb0b54D62ec3f561C2eebdaebd92432126F0817579c102b062d1a6c1f2ed83e8121233',
+            'topics' => [
+                '0xeb0b54D62ec3f561C2eebdaebd9243212', [
+                    '0xeb0b54D62ec3f561C2eebdaebd9243212', '0xzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz'
+                ]
+            ]
+        ]));
+        $this->assertEquals(true, $validator->validate([
+            'to' => '0xeb0b54D62ec3f561C2eebdaebd92432126F0817579c102b062d1a6c1f2ed83e8121233',
+            'topics' => [
+                '0xeb0b54D62ec3f561C2eebdaebd9243212', [
+                    '0xeb0b54D62ec3f561C2eebdaebd9243212', '0xeb0b54D62ec3f561C2eebdaebd9243212'
+                ]
+            ]
+        ]));
+        $this->assertEquals(true, $validator->validate([
+            'topics' => [
+                '0xeb0b54D62ec3f561C2eebdaebd9243212', [
+                    '0xeb0b54D62ec3f561C2eebdaebd9243212', '0xeb0b54D62ec3f561C2eebdaebd9243212'
+                ]
+            ]
+        ]));
+    }
+}
\ No newline at end of file