diff --git a/.arclint b/.arclint
--- a/.arclint
+++ b/.arclint
@@ -38,7 +38,7 @@
                 "(^test/functional/(abc|chronik).*\\.py$)"
             ],
             "flags": [
-                "--experimental-string-processing"
+                "--preview"
             ]
         },
         "flake8": {
diff --git a/test/functional/abc_mining_basic.py b/test/functional/abc_mining_basic.py
--- a/test/functional/abc_mining_basic.py
+++ b/test/functional/abc_mining_basic.py
@@ -52,8 +52,9 @@
             expected = {
                 **expected,
                 **{
-                    "sigchecklimit": DEFAULT_MAX_BLOCK_SIZE
-                    // BLOCK_MAXBYTES_MAXSIGCHECKS_RATIO,
+                    "sigchecklimit": (
+                        DEFAULT_MAX_BLOCK_SIZE // BLOCK_MAXBYTES_MAXSIGCHECKS_RATIO
+                    ),
                 },
             }