diff --git a/.github/workflows/code-style.yml b/.github/workflows/code-style.yml
index abc424d8..ad3ed1be 100644
--- a/.github/workflows/code-style.yml
+++ b/.github/workflows/code-style.yml
@@ -1,10 +1,28 @@
-name: Code style
+name: Format suggestions
 
 on:
   pull_request:
 
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
-  code-style:
+  format:
     runs-on: ubuntu-latest
+    env:
+      REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.REVIEWDOG_TOKEN }}
     steps:
-      - uses: tkf/julia-code-style-suggesters@v1
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v1
+      - run: |
+          julia --color=yes -e 'using Pkg; Pkg.add("JuliaFormatter")'
+          julia --color=yes -e 'using JuliaFormatter; format("."; verbose=true)'
+      - uses: reviewdog/action-suggester@v1
+        with:
+          tool_name: JuliaFormatter
+          github_token:  ${{ secrets.github_token }}
+          fail_on_error: true
+          filter_mode: added
diff --git a/docs/make.jl b/docs/make.jl
index 5cc0a9b3..d9bdd73a 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -1,12 +1,12 @@
 using Documenter, Aqua
 
 makedocs(;
-    modules = [Aqua],
+    modules = [Aqua ],
     pages = ["Home" => "index.md"],
     sitename = "Aqua.jl",
     format = Documenter.HTML(; repolink = "https://github.com/JuliaTesting/Aqua.jl"),
     authors = "Takafumi Arakaki",
-    warnonly = true,
+    warnonly = true
 )
 
-deploydocs(; repo = "github.com/JuliaTesting/Aqua.jl", push_preview = true)
+deploydocs(repo = "github.com/JuliaTesting/Aqua.jl", push_preview = true)
diff --git a/src/ambiguities.jl b/src/ambiguities.jl
index 4c22060e..79d2ea10 100644
--- a/src/ambiguities.jl
+++ b/src/ambiguities.jl
@@ -48,7 +48,7 @@ ispackage(m::Module) =
     if m in (Base, Core)
         true
     else
-        parentmodule(m) == m
+        parentmodule(m)==m
     end
 
 strnameof(x) = string(x)
@@ -71,7 +71,8 @@ function getobj((pkgid, name)::ExcludeSpec)
 end
 
 function normalize_and_check_exclude(exclude::AbstractVector)
-    exspecs = mapfoldl(normalize_exclude, push!, exclude, init = ExcludeSpec[])
+    exspecs = mapfoldl(normalize_exclude, push!, exclude, init =
+         ExcludeSpec[])
     for (spec, obj) in zip(exspecs, exclude)
         if getobj(spec) !== obj
             error("Name `$(spec[2])` is resolved to a different object.")
@@ -81,17 +82,16 @@ function normalize_and_check_exclude(exclude::AbstractVector)
 end
 
 function reprexclude(exspecs::Vector{ExcludeSpec})
-    itemreprs = map(exspecs) do (pkgid, name)
-        string("(", reprpkgid(pkgid), " => ", repr(name), ")")
-    end
-    return string("Aqua.ExcludeSpec[", join(itemreprs, ", "), "]")
+  itemreprs = map(exspecs) do (pkgid, name)
+           string("(", reprpkgid(pkgid), " => ", repr(name), ")")
+     end
+      return string("Aqua.ExcludeSpec[", join(itemreprs, ", "), "]")
 end
 
 function _test_ambiguities(packages::Vector{PkgId}; broken::Bool = false, kwargs...)
     num_ambiguities, strout, strerr = _find_ambiguities(packages; kwargs...)
 
-    print(stderr, strerr)
-    print(stdout, strout)
+    print(stderr,strerr);           print(stdout, strout)
 
     if broken
         @test_broken num_ambiguities == 0
diff --git a/test/test_ambiguities.jl b/test/test_ambiguities.jl
index ad2d8557..ca4bb78f 100644
--- a/test/test_ambiguities.jl
+++ b/test/test_ambiguities.jl
@@ -5,15 +5,15 @@ include("preamble.jl")
 using PkgWithAmbiguities
 
 @testset begin
-    function check_testcase(exclude, num_ambiguities::Int; broken::Bool = false)
-        pkgids = Aqua.aspkgids([PkgWithAmbiguities, Core]) # include Core to find constructor ambiguities
+ function check_testcase(exclude, num_ambiguities::Int; broken::Bool = false)
+         pkgids = Aqua.aspkgids([PkgWithAmbiguities, Core]) # include Core to find constructor ambiguities
         num_ambiguities_, strout, strerr = Aqua._find_ambiguities(pkgids; exclude = exclude)
         if broken
             @test_broken num_ambiguities_ == num_ambiguities
         else
             @test num_ambiguities_ == num_ambiguities
         end
-        @test isempty(strerr)
+        @test      isempty(   strerr   )
     end
 
     @static if VERSION >= v"1.3-"
@@ -22,7 +22,7 @@ using PkgWithAmbiguities
         total = 8
     end
 
-    check_testcase([], total)
+    check_testcase([   ],    total)
 
     # exclude just anything irrelevant, see #49
     check_testcase([convert], total)