diff --git a/config.nims b/config.nims
index 05a31fff..8700f60e 100644
--- a/config.nims
+++ b/config.nims
@@ -61,11 +61,12 @@ elif defined(macosx) and defined(arm64):
   switch("passC", "-mcpu=apple-a14")
   # TODO: newer Clang >=15.0 can: https://github.com/llvm/llvm-project/commit/fcca10c69aaab539962d10fcc59a5f074b73b0de
 else:
-  switch("passC", "-march=native")
   if defined(windows):
     # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65782
     # ("-fno-asynchronous-unwind-tables" breaks Nim's exception raising, sometimes)
-    switch("passC", "-mno-avx512vl")
+    switch("passC", "-march=x86-64")
+  else: switch("passC", "-march=native")
+    
 
 --tlsEmulation:
   off
diff --git a/tests/imports.nim b/tests/imports.nim
index 6cbc52e5..fbe642fc 100644
--- a/tests/imports.nim
+++ b/tests/imports.nim
@@ -2,14 +2,13 @@ import std/macros
 import std/os
 import std/strutils
 
-macro importTests*(dir: static string, excludes: static string = ""): untyped =
+macro importTests*(dir: static string): untyped =
   ## imports all files in the specified directory whose filename
   ## starts with "test" and ends in ".nim"
   let imports = newStmtList()
-  let excludeList = excludes.split(",")
   for file in walkDirRec(dir):
     let (_, name, ext) = splitFile(file)
-    if name.startsWith("test") and ext == ".nim" and not (name in excludeList):
+    if name.startsWith("test") and ext == ".nim":
       imports.add(
         quote do:
           import `file`