diff --git a/mpint.nimble b/mpint.nimble
index f29e12f..8e3eb65 100644
--- a/mpint.nimble
+++ b/mpint.nimble
@@ -9,7 +9,7 @@ srcDir        = "src"
 
 requires "nim >= 0.17.2"
 
-proc test(name: string, lang: string = "cpp") =
+proc test(name: string, lang: string = "c") =
   if not dirExists "build":
     mkDir "build"
   if not dirExists "nimcache":
@@ -20,4 +20,4 @@ proc test(name: string, lang: string = "cpp") =
   setCommand lang, "tests/" & name & ".nim"
 
 task test, "Run all tests":
-  test "all_tests"
\ No newline at end of file
+  test "all_tests"