diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 65993659..7de0cad3 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,9 @@
+ci:
+  skip: [julia-formatter]
+
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.5.0
+  rev: v5.0.0
   hooks:
   - id: check-merge-conflict
   - id: check-toml
@@ -9,6 +12,6 @@ repos:
     exclude_types: [markdown]  # incompatible with Literate.jl
 
 - repo: "https://github.com/domluna/JuliaFormatter.jl"
-  rev: v1.0.62  
+  rev: v2.1.1  
   hooks:
   - id: "julia-formatter"
diff --git a/test/runtests.jl b/test/runtests.jl
index 1c52c3e1..98b2d2b8 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -14,11 +14,13 @@ const GROUP = uppercase(
 )
 
 "match files of the form `test_*.jl`, but exclude `*setup*.jl`"
-istestfile(fn) =
-  endswith(fn, ".jl") && startswith(basename(fn), "test_") && !contains(fn, "setup")
+function istestfile(fn)
+  return endswith(fn, ".jl") && startswith(basename(fn), "test_") && !contains(fn, "setup")
+end
 "match files of the form `*.jl`, but exclude `*_notest.jl` and `*setup*.jl`"
-isexamplefile(fn) =
-  endswith(fn, ".jl") && !endswith(fn, "_notest.jl") && !contains(fn, "setup")
+function isexamplefile(fn)
+  return endswith(fn, ".jl") && !endswith(fn, "_notest.jl") && !contains(fn, "setup")
+end
 
 @time begin
   # tests in groups based on folder structure