diff --git a/src/Illuminate/Http/Client/Response.php b/src/Illuminate/Http/Client/Response.php
index 2b34293a046f..64331cfc39e9 100644
--- a/src/Illuminate/Http/Client/Response.php
+++ b/src/Illuminate/Http/Client/Response.php
@@ -343,6 +343,19 @@ public function throwIf($condition)
         return value($condition, $this) ? $this->throw(func_get_args()[1] ?? null) : $this;
     }
 
+    /**
+     * Throw an exception if a server or client error occurred and the given condition evaluates to false.
+     *
+     * @param  \Closure|bool  $condition
+     * @return $this
+     *
+     * @throws \Illuminate\Http\Client\RequestException
+     */
+    public function throwUnless($condition)
+    {
+        return $this->throwIf(! $condition);
+    }
+
     /**
      * Throw an exception if the response status code matches the given code.
      *
diff --git a/tests/Http/HttpClientTest.php b/tests/Http/HttpClientTest.php
index e2d1641ad31c..febc488c3a91 100644
--- a/tests/Http/HttpClientTest.php
+++ b/tests/Http/HttpClientTest.php
@@ -3188,6 +3188,35 @@ public function testRequestExceptionIsNotThrownIfConditionIsNotSatisfied()
         $this->assertSame('{"result":{"foo":"bar"}}', $response->body());
     }
 
+    public function testRequestExceptionIsThrownWhenUnlessConditionIsNotSatisfied()
+    {
+        $this->factory->fake([
+            '*' => $this->factory::response('', 400),
+        ]);
+
+        $exception = null;
+
+        try {
+            $this->factory->get('http://foo.com/api')->throwUnless(false);
+        } catch (RequestException $e) {
+            $exception = $e;
+        }
+
+        $this->assertNotNull($exception);
+        $this->assertInstanceOf(RequestException::class, $exception);
+    }
+
+    public function testRequestExceptionIsNotThrownWhenUnlessConditionIsSatisfied()
+    {
+        $this->factory->fake([
+            '*' => $this->factory::response(['result' => ['foo' => 'bar']], 400),
+        ]);
+
+        $response = $this->factory->get('http://foo.com/api')->throwUnless(true);
+
+        $this->assertSame('{"result":{"foo":"bar"}}', $response->body());
+    }
+
     public function testRequestExceptionIsThrowIfConditionClosureIsSatisfied()
     {
         $this->factory->fake([