diff --git a/tests/Feature/Docs/OpenApiPathsTest.php b/tests/Feature/Docs/OpenApiPathsTest.php
index 6adf87a..0314c4b 100644
--- a/tests/Feature/Docs/OpenApiPathsTest.php
+++ b/tests/Feature/Docs/OpenApiPathsTest.php
@@ -27,3 +27,9 @@
     expect($paths)->toHaveKey("/files/{file}/targets")
         ->and($paths["/files/{file}/targets"])->toHaveKey("get");
 });
+
+it('documents conversion cost estimate endpoint', function () {
+    $paths = openApiSpec()["paths"];
+    expect($paths)->toHaveKey("/conversions/estimate")
+        ->and($paths["/conversions/estimate"])->toHaveKey("post");
+});