diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 71e8cfc..a3c0b84 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,11 +26,11 @@ jobs:
         include:
           - target:
               os: linux
-            builder: ubuntu-18.04
+            builder: ubuntu-20.04
             shell: bash
           - target:
               os: macos
-            builder: macos-10.15
+            builder: macos-11
             shell: bash
           - target:
               os: windows
diff --git a/faststreams.nimble b/faststreams.nimble
index c231d41..a6dbf0d 100644
--- a/faststreams.nimble
+++ b/faststreams.nimble
@@ -18,7 +18,16 @@ proc test(args, path: string) =
   # Compilation language is controlled by TEST_LANG
   let lang = getEnv("TEST_LANG", "c")
 
-  var common_args = "-r -f " & getEnv("NIMFLAGS") &  " --hints:off --styleCheck:usages --styleCheck:error"
+  # nnkArglist was changed to nnkArgList, so can't always use --styleCheck:error
+  # https://github.com/nim-lang/Nim/pull/17529
+  # https://github.com/nim-lang/Nim/pull/19822
+  let styleCheckStyle =
+    if (NimMajor, NimMinor) < (1, 6):
+      "hint"
+    else:
+      "error"
+
+  var common_args = "-r -f " & getEnv("NIMFLAGS") &  " --hints:off --styleCheck:usages --styleCheck:" & styleCheckStyle
 
   if getEnv("NIMBUS_ENV_DIR") != "":
     common_args &= " --skipParentCfg"