diff --git a/.github/workflows/ReusableTest.yml b/.github/workflows/ReusableTest.yml
index 3c0d6479..00eff2b1 100644
--- a/.github/workflows/ReusableTest.yml
+++ b/.github/workflows/ReusableTest.yml
@@ -41,6 +41,8 @@ jobs:
         uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
+        env:
+          TMPDIR: "${{ runner.temp }}"
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v4
         with:
diff --git a/src/COPIERTemplate.jl b/src/COPIERTemplate.jl
index 2aa8e609..95add16d 100644
--- a/src/COPIERTemplate.jl
+++ b/src/COPIERTemplate.jl
@@ -1,3 +1,11 @@
+"""
+# COPIERTemplate.jl
+
+This package defines a copier template for Julia packages and a basic user interface aroud copier
+to use it from Julia.
+
+The main functions are: [`generate`](@ref)
+"""
 module COPIERTemplate
 
 using PythonCall, CondaPkg, UUIDs
@@ -7,24 +15,60 @@ function __init__()
 end
 
 """
-    generate(dst_path; kwargs...)
-    generate(src_path, dst_path; kwargs...)
+    copy(dst_path[, data]; kwargs...)
+    copy(src_path, dst_path[, data]; kwargs...)
 
-Runs the `copy` command of [copier](https://github.com/copier-org/copier) with the COPIERTemplate template.
+Wrapper around Python's [copier.run_copy](https://copier.readthedocs.io/en/stable/reference/main/#copier.main.run_copy).
+Use [`generate`](@ref) for a more user-friendly function.
+"""
+function Base.copy(src_path, dst_path, data::Dict = Dict(); kwargs...)
+  copier = PythonCall.pyimport("copier")
+  copier.run_copy(src_path, dst_path, data; kwargs...)
+end
 
-If `src_path` is not informed, the GitHub URL of COPIERTemplate.jl is used.
+function Base.copy(dst_path, data::Dict = Dict(); kwargs...)
+  copy(joinpath(@__DIR__, ".."), dst_path, data; kwargs...)
+end
 
-Even though the template is available offline through this template, this uses the github URL to allow updating.
+"""
+    recopy(dst_path[, data]; kwargs...)
 
-The keyword arguments are passed directly to the `run_copy` function of `copier`.
+Wrapper around Python's [copier.run_recopy](https://copier.readthedocs.io/en/stable/reference/main/#copier.main.run_recopy).
 """
-function generate(src_path, dst_path; kwargs...)
+function recopy(dst_path, data::Dict = Dict(); kwargs...)
   copier = PythonCall.pyimport("copier")
-  copier.run_copy(src_path, dst_path; kwargs..., vcs_ref = "HEAD")
+  copier.run_recopy(dst_path, data; kwargs...)
+end
+
+"""
+    update(dst_path[, data]; kwargs...)
+
+Wrapper around Python's [copier.run_update](https://copier.readthedocs.io/en/stable/reference/main/#copier.main.run_update).
+"""
+function update(dst_path, data::Dict = Dict(); kwargs...)
+  copier = PythonCall.pyimport("copier")
+  copier.run_update(dst_path, data; kwargs...)
+end
+
+"""
+    generate(dst_path[, data]; kwargs...)
+    generate(src_path, dst_path[, data]; true, kwargs...)
+
+Runs the `copy` command of [copier](https://github.com/copier-org/copier) with the COPIERTemplate template.
+If `src_path` is not informed, the GitHub URL of COPIERTemplate.jl is used.
+
+The `data` argument is a dictionary of answers (values) to questions (keys) that can be used to bypass some of the interactive questions.
+
+## Keyword arguments
+
+The keyword arguments are passed directly to [`copy`](@ref).
+"""
+function generate(src_path, dst_path, data::Dict = Dict(); kwargs...)
+  copy(src_path, dst_path, data; kwargs...)
 end
 
-function generate(dst_path, args...; kwargs...)
-  generate("https://github.com/abelsiqueira/COPIERTemplate.jl", dst_path, args...; kwargs...)
+function generate(dst_path, data::Dict = Dict(); kwargs...)
+  generate("https://github.com/abelsiqueira/COPIERTemplate.jl", dst_path, data; kwargs...)
 end
 
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index bacf069e..2a0a8454 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,14 +1,30 @@
-# This is only useful for testing offline. It creates a local env to avoid redownloading things.
+# Can't use mktempdir on GitHub actions willy nilly (at least on Mac)
+TMPDIR = get(ENV, "TMPDIR", mktempdir())
+
 if get(ENV, "CI", "nothing") == "nothing"
+  # This is only useful for testing offline. It creates a local env to avoid redownloading things.
   ENV["JULIA_CONDAPKG_ENV"] = joinpath(@__DIR__, "conda-env")
   if isdir(ENV["JULIA_CONDAPKG_ENV"])
     ENV["JULIA_CONDAPKG_OFFLINE"] = true
   end
+
+  # Mac is a complicated beast
+  if Sys.isapple()
+    TMPDIR = "/private$TMPDIR"
+  end
 end
 
 using COPIERTemplate
 using Test
 
+template_minimum_options = Dict(
+  "PackageName" => "Tmp",
+  "PackageUUID" => "1234",
+  "PackageOwner" => "test",
+  "AuthorName" => "Test",
+  "AuthorEmail" => "test@me.now",
+)
+
 template_options = Dict(
   "PackageName" => "Tmp",
   "PackageUUID" => "1234",
@@ -51,35 +67,36 @@ function test_diff_dir(dir1, dir2)
   end
 end
 
+min_bash_args = vcat([["-d"; "$k=$v"] for (k, v) in template_minimum_options]...)
 bash_args = vcat([["-d"; "$k=$v"] for (k, v) in template_options]...)
 template_path = joinpath(@__DIR__, "..")
 template_url = "https://github.com/abelsiqueira/COPIERTemplate.jl"
 
+# This is a hack because Windows managed to dirty the repo.
+if get(ENV, "CI", "nothing") == "true" && Sys.iswindows()
+  run(`git reset --hard HEAD`)
+end
+
 @testset "Compare COPIERTemplate.generate vs copier CLI on URL/main" begin
-  mktempdir(; prefix = "cli_") do dir_copier_cli
+  mktempdir(TMPDIR; prefix = "cli_") do dir_copier_cli
     run(`copier copy --vcs-ref main --quiet $bash_args $template_url $dir_copier_cli`)
 
-    mktempdir(; prefix = "copy_") do tmpdir
-      COPIERTemplate.generate(tmpdir; data = template_options, quiet = true, vcs_ref = "main")
+    mktempdir(TMPDIR; prefix = "copy_") do tmpdir
+      COPIERTemplate.generate(tmpdir, template_options; quiet = true, vcs_ref = "main")
       test_diff_dir(tmpdir, dir_copier_cli)
     end
   end
 end
 
 @testset "Compare COPIERTemplate.generate vs copier CLI on HEAD" begin
-  # This is a hack because Windows managed to dirty the repo.
-  if get(ENV, "CI", "nothing") == "true" && Sys.iswindows()
-    run(`git reset --hard HEAD`)
-  end
-
-  mktempdir(; prefix = "cli_") do dir_copier_cli
+  mktempdir(TMPDIR; prefix = "cli_") do dir_copier_cli
     run(`copier copy --vcs-ref HEAD --quiet $bash_args $template_path $dir_copier_cli`)
 
-    mktempdir(; prefix = "copy_") do tmpdir
+    mktempdir(TMPDIR; prefix = "copy_") do tmpdir
       COPIERTemplate.generate(
         template_path,
-        tmpdir;
-        data = template_options,
+        tmpdir,
+        template_options;
         quiet = true,
         vcs_ref = "HEAD",
       )
@@ -87,3 +104,39 @@ end
     end
   end
 end
+
+@testset "Testing copy, recopy and rebase" begin
+  mktempdir(TMPDIR; prefix = "cli_") do dir_copier_cli
+    run(`copier copy --quiet $bash_args $template_path $dir_copier_cli`)
+
+    @testset "Compare copied project vs copier CLI baseline" begin
+      mktempdir(TMPDIR; prefix = "copy_") do tmpdir
+        COPIERTemplate.copy(tmpdir, template_options; quiet = true)
+        test_diff_dir(tmpdir, dir_copier_cli)
+      end
+    end
+
+    @testset "Compare recopied project vs copier CLI baseline" begin
+      mktempdir(TMPDIR; prefix = "recopy_") do tmpdir
+        run(`copier copy --defaults --quiet $min_bash_args $template_path $tmpdir`)
+        COPIERTemplate.recopy(tmpdir, template_options; quiet = true, overwrite = true)
+        test_diff_dir(tmpdir, dir_copier_cli)
+      end
+    end
+
+    @testset "Compare updated project vs copier CLI baseline" begin
+      mktempdir(TMPDIR; prefix = "update_") do tmpdir
+        run(`copier copy --defaults --quiet $min_bash_args $template_path $tmpdir`)
+        cd(tmpdir) do
+          run(`git init`)
+          run(`git add .`)
+          run(`git config user.name "Test"`)
+          run(`git config user.email "test@test.com"`)
+          run(`git commit -q -m "First commit"`)
+        end
+        COPIERTemplate.update(tmpdir, template_options; overwrite = true, quiet = true)
+        test_diff_dir(tmpdir, dir_copier_cli)
+      end
+    end
+  end
+end