diff --git a/tests/test_tpp.py b/tests/test_tpp.py
index cb5b0b6..858cb50 100644
--- a/tests/test_tpp.py
+++ b/tests/test_tpp.py
@@ -17,11 +17,7 @@
 tppMain = pytpp.__main__.main
 
 def get_bwa():
-    if (os.path.exists("/usr/bin/bwa")):
-        return "/usr/bin/bwa"
-    elif (os.path.exists("/usr/local/bin/bwa")):
-        return "/usr/local/bin/bwa"
-    return ""
+    return shutil.which("bwa") if not None else None
 
 bwa_path = get_bwa()