diff --git a/src/Concerns/MakesHttpRequests.php b/src/Concerns/MakesHttpRequests.php
index 72bd2c0..b3a386f 100644
--- a/src/Concerns/MakesHttpRequests.php
+++ b/src/Concerns/MakesHttpRequests.php
@@ -496,7 +496,7 @@ protected function seeHeader($headerName, $value = null)
 
         if (! is_null($value)) {
             $this->assertEquals(
-                $headers->get($headerName), $value,
+                $value, $headers->get($headerName),
                 "Header [{$headerName}] was found, but value [{$headers->get($headerName)}] does not match [{$value}]."
             );
         }