diff --git a/tests/lzma.nim b/tests/lzma.nim
index 1f0a1fb..4f6c41a 100644
--- a/tests/lzma.nim
+++ b/tests/lzma.nim
@@ -4,7 +4,7 @@ import nimterop/[build, cimport]
 
 const
   baseDir = getProjectCacheDir("nimterop" / "tests" / "liblzma")
-  flags = "--prefix=__,_ --suffix=__,_"
+  flags = "--prefix=___,__,_ --suffix=__,_"
 
 static:
   cDebug()