diff --git a/src/Optimizely/OptimizelyUserContext.php b/src/Optimizely/OptimizelyUserContext.php
index 3f176488..c1b50264 100644
--- a/src/Optimizely/OptimizelyUserContext.php
+++ b/src/Optimizely/OptimizelyUserContext.php
@@ -31,6 +31,11 @@ public function __construct(Optimizely $optimizelyClient, $userId, array $attrib
         $this->attributes = $attributes;
     }
 
+    protected function copy()
+    {
+        return new OptimizelyUserContext($this->optimizelyClient, $this->userId, $this->attributes);
+    }
+
     public function setAttribute($key, $value)
     {
         $this->attributes[$key] = $value;
@@ -38,17 +43,17 @@ public function setAttribute($key, $value)
 
     public function decide($key, array $options = [])
     {
-        return $this->optimizelyClient->decide($this, $key, $options);
+        return $this->optimizelyClient->decide($this->copy(), $key, $options);
     }
 
     public function decideForKeys(array $keys, array $options = [])
     {
-        return $this->optimizelyClient->decideForKeys($this, $keys, $options);
+        return $this->optimizelyClient->decideForKeys($this->copy(), $keys, $options);
     }
 
     public function decideAll(array $options = [])
     {
-        return $this->optimizelyClient->decideAll($this, $options);
+        return $this->optimizelyClient->decideAll($this->copy(), $options);
     }
 
     public function trackEvent($eventKey, array $eventTags = [])
diff --git a/tests/OptimizelyUserContextTests.php b/tests/OptimizelyUserContextTest.php
similarity index 90%
rename from tests/OptimizelyUserContextTests.php
rename to tests/OptimizelyUserContextTest.php
index 671b9ae1..c41667b0 100644
--- a/tests/OptimizelyUserContextTests.php
+++ b/tests/OptimizelyUserContextTest.php
@@ -16,8 +16,6 @@
  */
 namespace Optimizely\Tests;
 
-require(dirname(__FILE__).'/TestData.php');
-
 use Exception;
 use TypeError;
 
@@ -137,6 +135,29 @@ public function testDecideCallsAndReturnsOptimizelyDecideAPI()
         );
     }
 
+    public function testDecideResponseUserContextNotEqualToCalledUserContext()
+    {
+        $userId = 'test_user';
+        $attributes = [ "browser" => "chrome"];
+    
+        $optlyObject = new Optimizely($this->datafile);
+
+        $optUserContext = new OptimizelyUserContext($optlyObject, $userId, $attributes);
+        $decision = $optUserContext->decide('test_feature', ['DISABLE_DECISION_EVENT', 'ENABLED_FLAGS_ONLY']);
+        
+        $this->assertEquals(
+            $optUserContext->getAttributes(),
+            $decision->getUserContext()->getAttributes()
+        );
+
+        $optUserContext->setAttribute("test_key", "test_value");
+        
+        $this->assertNotEquals(
+            $optUserContext->getAttributes(),
+            $decision->getUserContext()->getAttributes()
+        );
+    }
+
     public function testDecideAllCallsAndReturnsOptimizelyDecideAllAPI()
     {
         $userId = 'test_user';