diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index ef6f3dc4..33f0115a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -36,9 +36,9 @@ jobs:
           - os: windows-latest
             arch: x86
         include:
-          # Add a 1.5 job because that's what Invenia actually uses
+          # Add 1.7.1 to run the reference tests
           - os: ubuntu-latest
-            version: 1.5
+            version: 1.7.1
             arch: x64
     steps:
       - uses: actions/checkout@v2
diff --git a/src/plugins/project_file.jl b/src/plugins/project_file.jl
index 28efd583..06be5a92 100644
--- a/src/plugins/project_file.jl
+++ b/src/plugins/project_file.jl
@@ -16,14 +16,27 @@ priority(::ProjectFile, ::typeof(hook)) = typemax(Int) - 5
 function hook(p::ProjectFile, t::Template, pkg_dir::AbstractString)
     toml = Dict(
         "name" => basename(pkg_dir),
-        "uuid" => string(uuid4()),
+        "uuid" => string(@mock uuid4()),
         "authors" => t.authors,
         "version" => string(p.version),
         "compat" => Dict("julia" => compat_version(t.julia)),
     )
-    open(io -> TOML.print(io, toml), joinpath(pkg_dir, "Project.toml"), "w")
+    write_project(joinpath(pkg_dir, "Project.toml"), toml)
 end
 
+# Taken from:
+# https://github.com/JuliaLang/Pkg.jl/blob/v1.7.0/src/project.jl#L175-L177
+
+function project_key_order(key::String)
+    _project_key_order = ["name", "uuid", "keywords", "license", "desc", "deps", "compat"]
+    return something(findfirst(x -> x == key, _project_key_order), length(_project_key_order) + 1)
+end
+
+write_project(path::AbstractString, dict) =
+    open(io -> write_project(io, dict), path; write = true)
+write_project(io::IO, dict) =
+    TOML.print(io, dict, sorted = true, by = key -> (project_key_order(key), key))
+
 """
     compat_version(v::VersionNumber) -> String
 
diff --git a/src/plugins/tests.jl b/src/plugins/tests.jl
index d100cd3b..6b21a631 100644
--- a/src/plugins/tests.jl
+++ b/src/plugins/tests.jl
@@ -54,10 +54,9 @@ function add_test_dependency(pkg_dir::AbstractString)
     toml = TOML.parsefile(path)
     get!(toml, "extras", Dict())["Test"] = TEST_UUID
     get!(toml, "targets", Dict())["test"] = ["Test"]
-    open(io -> TOML.print(io, toml), path, "w")
+    write_project(path, toml)
 
     # Generate the manifest by updating the project.
-    # This also ensures that keys in Project.toml are sorted properly.
     touch(joinpath(pkg_dir, "Manifest.toml"))  # File must exist to be modified by Pkg.
     with_project(Pkg.update, pkg_dir)
 end
diff --git a/test/fixtures/AllPlugins/.appveyor.yml b/test/fixtures/AllPlugins/.appveyor.yml
index 39e05537..61ed1528 100644
--- a/test/fixtures/AllPlugins/.appveyor.yml
+++ b/test/fixtures/AllPlugins/.appveyor.yml
@@ -2,7 +2,7 @@
 environment:
   matrix:
     - julia_version: 1.0
-    - julia_version: 1.5
+    - julia_version: 1.7
     - julia_version: nightly
 platform:
   - x64
diff --git a/test/fixtures/AllPlugins/.cirrus.yml b/test/fixtures/AllPlugins/.cirrus.yml
index 153e8d14..439d77bc 100644
--- a/test/fixtures/AllPlugins/.cirrus.yml
+++ b/test/fixtures/AllPlugins/.cirrus.yml
@@ -6,7 +6,7 @@ task:
     folder: ~/.julia/artifacts
   env:
     JULIA_VERSION: 1.0
-    JULIA_VERSION: 1.5
+    JULIA_VERSION: 1.7
     JULIA_VERSION: nightly
   install_script:
     - sh -c "$(fetch https://raw.githubusercontent.com/ararslan/CirrusCI.jl/master/bin/install.sh -o -)"
diff --git a/test/fixtures/AllPlugins/.drone.star b/test/fixtures/AllPlugins/.drone.star
index 48a7d19c..f1a8a313 100644
--- a/test/fixtures/AllPlugins/.drone.star
+++ b/test/fixtures/AllPlugins/.drone.star
@@ -1,7 +1,7 @@
 def main(ctx):
   pipelines = []
   for arch in ["amd64"]:
-    for julia in ["1.0", "1.5"]:
+    for julia in ["1.0", "1.7"]:
       pipelines.append(pipeline(arch, julia))
   return pipelines
 
diff --git a/test/fixtures/AllPlugins/.github/workflows/CI.yml b/test/fixtures/AllPlugins/.github/workflows/CI.yml
index 12f61c9d..45988a26 100644
--- a/test/fixtures/AllPlugins/.github/workflows/CI.yml
+++ b/test/fixtures/AllPlugins/.github/workflows/CI.yml
@@ -19,7 +19,7 @@ jobs:
       matrix:
         version:
           - '1.0'
-          - '1.5'
+          - '1.7'
           - 'nightly'
         os:
           - ubuntu-latest
diff --git a/test/fixtures/AllPlugins/.gitlab-ci.yml b/test/fixtures/AllPlugins/.gitlab-ci.yml
index 2050fdac..cd55e9b0 100644
--- a/test/fixtures/AllPlugins/.gitlab-ci.yml
+++ b/test/fixtures/AllPlugins/.gitlab-ci.yml
@@ -21,8 +21,8 @@ Julia 1.0:
   extends:
     - .script
     - .coverage
-Julia 1.5:
-  image: julia:1.5
+Julia 1.7:
+  image: julia:1.7
   extends:
     - .script
     - .coverage
diff --git a/test/fixtures/AllPlugins/.travis.yml b/test/fixtures/AllPlugins/.travis.yml
index e3501a46..52fa2a20 100644
--- a/test/fixtures/AllPlugins/.travis.yml
+++ b/test/fixtures/AllPlugins/.travis.yml
@@ -4,7 +4,7 @@ notifications:
   email: false
 julia:
   - 1.0
-  - 1.5
+  - 1.7
   - nightly
 os:
   - linux
diff --git a/test/fixtures/AllPlugins/Project.toml b/test/fixtures/AllPlugins/Project.toml
index 60e925dd..e49ecb13 100644
--- a/test/fixtures/AllPlugins/Project.toml
+++ b/test/fixtures/AllPlugins/Project.toml
@@ -1,5 +1,5 @@
 name = "AllPlugins"
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 authors = ["tester"]
 version = "0.1.0"
 
diff --git a/test/fixtures/AllPlugins/docs/Manifest.toml b/test/fixtures/AllPlugins/docs/Manifest.toml
index a3d6a003..7a63bf23 100644
--- a/test/fixtures/AllPlugins/docs/Manifest.toml
+++ b/test/fixtures/AllPlugins/docs/Manifest.toml
@@ -1,98 +1,149 @@
 # This file is machine-generated - editing it directly is not advised
 
-[[AllPlugins]]
+julia_version = "1.7.1"
+manifest_format = "2.0"
+
+[[deps.AllPlugins]]
 path = ".."
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 version = "0.1.0"
 
-[[Base64]]
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
-[[Dates]]
+[[deps.Dates]]
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
-[[Distributed]]
-deps = ["Random", "Serialization", "Sockets"]
-uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
-
-[[DocStringExtensions]]
+[[deps.DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
 git-tree-sha1 = "88bb0edb352b16608036faadcc071adda068582a"
 uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 version = "0.8.1"
 
-[[Documenter]]
+[[deps.Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
 git-tree-sha1 = "0be9bf63e854a2408c2ecd3c600d68d4d87d8a73"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 version = "0.24.2"
 
-[[InteractiveUtils]]
+[[deps.Downloads]]
+deps = ["ArgTools", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+
+[[deps.InteractiveUtils]]
 deps = ["Markdown"]
 uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
-[[JSON]]
+[[deps.JSON]]
 deps = ["Dates", "Mmap", "Parsers", "Unicode"]
 git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
 uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 version = "0.21.0"
 
-[[LibGit2]]
-deps = ["Printf"]
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
 uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
 
-[[Libdl]]
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+
+[[deps.Libdl]]
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
-[[Logging]]
+[[deps.Logging]]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
-[[Markdown]]
+[[deps.Markdown]]
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
-[[Mmap]]
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+
+[[deps.Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
 
-[[Parsers]]
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+
+[[deps.Parsers]]
 deps = ["Dates", "Test"]
 git-tree-sha1 = "0139ba59ce9bc680e2925aec5b7db79065d60556"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
 version = "0.3.10"
 
-[[Pkg]]
-deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
-[[Printf]]
+[[deps.Printf]]
 deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
-[[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets"]
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
-[[Random]]
-deps = ["Serialization"]
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
 uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
-[[SHA]]
+[[deps.SHA]]
 uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
-[[Serialization]]
+[[deps.Serialization]]
 uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
-[[Sockets]]
+[[deps.Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
-[[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
-[[UUIDs]]
+[[deps.UUIDs]]
 deps = ["Random", "SHA"]
 uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
-[[Unicode]]
+[[deps.Unicode]]
 uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
diff --git a/test/fixtures/Basic/Project.toml b/test/fixtures/Basic/Project.toml
index 3d5ccb69..7d95c467 100644
--- a/test/fixtures/Basic/Project.toml
+++ b/test/fixtures/Basic/Project.toml
@@ -1,5 +1,5 @@
 name = "Basic"
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 authors = ["tester"]
 version = "0.1.0"
 
diff --git a/test/fixtures/DocumenterGitHubActions/.github/workflows/CI.yml b/test/fixtures/DocumenterGitHubActions/.github/workflows/CI.yml
index 6198b511..71432e3d 100644
--- a/test/fixtures/DocumenterGitHubActions/.github/workflows/CI.yml
+++ b/test/fixtures/DocumenterGitHubActions/.github/workflows/CI.yml
@@ -19,7 +19,7 @@ jobs:
       matrix:
         version:
           - '1.0'
-          - '1.5'
+          - '1.7'
           - 'nightly'
         os:
           - ubuntu-latest
diff --git a/test/fixtures/DocumenterGitHubActions/Project.toml b/test/fixtures/DocumenterGitHubActions/Project.toml
index ac61e7d4..4963748a 100644
--- a/test/fixtures/DocumenterGitHubActions/Project.toml
+++ b/test/fixtures/DocumenterGitHubActions/Project.toml
@@ -1,5 +1,5 @@
 name = "DocumenterGitHubActions"
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 authors = ["tester"]
 version = "0.1.0"
 
diff --git a/test/fixtures/DocumenterGitHubActions/docs/Manifest.toml b/test/fixtures/DocumenterGitHubActions/docs/Manifest.toml
index 9651d293..d7ad9b76 100644
--- a/test/fixtures/DocumenterGitHubActions/docs/Manifest.toml
+++ b/test/fixtures/DocumenterGitHubActions/docs/Manifest.toml
@@ -1,98 +1,149 @@
 # This file is machine-generated - editing it directly is not advised
 
-[[Base64]]
+julia_version = "1.7.1"
+manifest_format = "2.0"
+
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
-[[Dates]]
+[[deps.Dates]]
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
-[[Distributed]]
-deps = ["Random", "Serialization", "Sockets"]
-uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
-
-[[DocStringExtensions]]
+[[deps.DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
 git-tree-sha1 = "88bb0edb352b16608036faadcc071adda068582a"
 uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 version = "0.8.1"
 
-[[Documenter]]
+[[deps.Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
 git-tree-sha1 = "0be9bf63e854a2408c2ecd3c600d68d4d87d8a73"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 version = "0.24.2"
 
-[[DocumenterGitHubActions]]
+[[deps.DocumenterGitHubActions]]
 path = ".."
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 version = "0.1.0"
 
-[[InteractiveUtils]]
+[[deps.Downloads]]
+deps = ["ArgTools", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+
+[[deps.InteractiveUtils]]
 deps = ["Markdown"]
 uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
-[[JSON]]
+[[deps.JSON]]
 deps = ["Dates", "Mmap", "Parsers", "Unicode"]
 git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
 uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 version = "0.21.0"
 
-[[LibGit2]]
-deps = ["Printf"]
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
 uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
 
-[[Libdl]]
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+
+[[deps.Libdl]]
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
-[[Logging]]
+[[deps.Logging]]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
-[[Markdown]]
+[[deps.Markdown]]
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
-[[Mmap]]
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+
+[[deps.Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
 
-[[Parsers]]
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+
+[[deps.Parsers]]
 deps = ["Dates", "Test"]
 git-tree-sha1 = "0139ba59ce9bc680e2925aec5b7db79065d60556"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
 version = "0.3.10"
 
-[[Pkg]]
-deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
-[[Printf]]
+[[deps.Printf]]
 deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
-[[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets"]
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
-[[Random]]
-deps = ["Serialization"]
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
 uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
-[[SHA]]
+[[deps.SHA]]
 uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
-[[Serialization]]
+[[deps.Serialization]]
 uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
-[[Sockets]]
+[[deps.Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
-[[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
-[[UUIDs]]
+[[deps.UUIDs]]
 deps = ["Random", "SHA"]
 uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
-[[Unicode]]
+[[deps.Unicode]]
 uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
diff --git a/test/fixtures/DocumenterGitLabCI/.gitlab-ci.yml b/test/fixtures/DocumenterGitLabCI/.gitlab-ci.yml
index 95bb2e7f..8b068672 100644
--- a/test/fixtures/DocumenterGitLabCI/.gitlab-ci.yml
+++ b/test/fixtures/DocumenterGitLabCI/.gitlab-ci.yml
@@ -21,8 +21,8 @@ Julia 1.0:
   extends:
     - .script
     - .coverage
-Julia 1.5:
-  image: julia:1.5
+Julia 1.7:
+  image: julia:1.7
   extends:
     - .script
     - .coverage
diff --git a/test/fixtures/DocumenterGitLabCI/Project.toml b/test/fixtures/DocumenterGitLabCI/Project.toml
index 454fe0c5..c657f202 100644
--- a/test/fixtures/DocumenterGitLabCI/Project.toml
+++ b/test/fixtures/DocumenterGitLabCI/Project.toml
@@ -1,5 +1,5 @@
 name = "DocumenterGitLabCI"
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 authors = ["tester"]
 version = "0.1.0"
 
diff --git a/test/fixtures/DocumenterGitLabCI/docs/Manifest.toml b/test/fixtures/DocumenterGitLabCI/docs/Manifest.toml
index 4579f615..2a044a0f 100644
--- a/test/fixtures/DocumenterGitLabCI/docs/Manifest.toml
+++ b/test/fixtures/DocumenterGitLabCI/docs/Manifest.toml
@@ -1,98 +1,149 @@
 # This file is machine-generated - editing it directly is not advised
 
-[[Base64]]
+julia_version = "1.7.1"
+manifest_format = "2.0"
+
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
-[[Dates]]
+[[deps.Dates]]
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
-[[Distributed]]
-deps = ["Random", "Serialization", "Sockets"]
-uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
-
-[[DocStringExtensions]]
+[[deps.DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
 git-tree-sha1 = "88bb0edb352b16608036faadcc071adda068582a"
 uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 version = "0.8.1"
 
-[[Documenter]]
+[[deps.Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
 git-tree-sha1 = "0be9bf63e854a2408c2ecd3c600d68d4d87d8a73"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 version = "0.24.2"
 
-[[DocumenterGitLabCI]]
+[[deps.DocumenterGitLabCI]]
 path = ".."
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 version = "0.1.0"
 
-[[InteractiveUtils]]
+[[deps.Downloads]]
+deps = ["ArgTools", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+
+[[deps.InteractiveUtils]]
 deps = ["Markdown"]
 uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
-[[JSON]]
+[[deps.JSON]]
 deps = ["Dates", "Mmap", "Parsers", "Unicode"]
 git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
 uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 version = "0.21.0"
 
-[[LibGit2]]
-deps = ["Printf"]
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
 uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
 
-[[Libdl]]
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+
+[[deps.Libdl]]
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
-[[Logging]]
+[[deps.Logging]]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
-[[Markdown]]
+[[deps.Markdown]]
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
-[[Mmap]]
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+
+[[deps.Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
 
-[[Parsers]]
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+
+[[deps.Parsers]]
 deps = ["Dates", "Test"]
 git-tree-sha1 = "0139ba59ce9bc680e2925aec5b7db79065d60556"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
 version = "0.3.10"
 
-[[Pkg]]
-deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
-[[Printf]]
+[[deps.Printf]]
 deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
-[[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets"]
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
-[[Random]]
-deps = ["Serialization"]
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
 uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
-[[SHA]]
+[[deps.SHA]]
 uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
-[[Serialization]]
+[[deps.Serialization]]
 uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
-[[Sockets]]
+[[deps.Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
-[[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
-[[UUIDs]]
+[[deps.UUIDs]]
 deps = ["Random", "SHA"]
 uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
-[[Unicode]]
+[[deps.Unicode]]
 uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
diff --git a/test/fixtures/DocumenterTravis/.travis.yml b/test/fixtures/DocumenterTravis/.travis.yml
index 8ea99890..298a2edb 100644
--- a/test/fixtures/DocumenterTravis/.travis.yml
+++ b/test/fixtures/DocumenterTravis/.travis.yml
@@ -4,7 +4,7 @@ notifications:
   email: false
 julia:
   - 1.0
-  - 1.5
+  - 1.7
   - nightly
 os:
   - linux
diff --git a/test/fixtures/DocumenterTravis/Project.toml b/test/fixtures/DocumenterTravis/Project.toml
index c1c62704..9b1210d1 100644
--- a/test/fixtures/DocumenterTravis/Project.toml
+++ b/test/fixtures/DocumenterTravis/Project.toml
@@ -1,5 +1,5 @@
 name = "DocumenterTravis"
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 authors = ["tester"]
 version = "0.1.0"
 
diff --git a/test/fixtures/DocumenterTravis/docs/Manifest.toml b/test/fixtures/DocumenterTravis/docs/Manifest.toml
index d439c415..b8a9d965 100644
--- a/test/fixtures/DocumenterTravis/docs/Manifest.toml
+++ b/test/fixtures/DocumenterTravis/docs/Manifest.toml
@@ -1,98 +1,149 @@
 # This file is machine-generated - editing it directly is not advised
 
-[[Base64]]
+julia_version = "1.7.1"
+manifest_format = "2.0"
+
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
-[[Dates]]
+[[deps.Dates]]
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
-[[Distributed]]
-deps = ["Random", "Serialization", "Sockets"]
-uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
-
-[[DocStringExtensions]]
+[[deps.DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
 git-tree-sha1 = "88bb0edb352b16608036faadcc071adda068582a"
 uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 version = "0.8.1"
 
-[[Documenter]]
+[[deps.Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
 git-tree-sha1 = "0be9bf63e854a2408c2ecd3c600d68d4d87d8a73"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 version = "0.24.2"
 
-[[DocumenterTravis]]
+[[deps.DocumenterTravis]]
 path = ".."
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 version = "0.1.0"
 
-[[InteractiveUtils]]
+[[deps.Downloads]]
+deps = ["ArgTools", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+
+[[deps.InteractiveUtils]]
 deps = ["Markdown"]
 uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
-[[JSON]]
+[[deps.JSON]]
 deps = ["Dates", "Mmap", "Parsers", "Unicode"]
 git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
 uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 version = "0.21.0"
 
-[[LibGit2]]
-deps = ["Printf"]
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
 uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
 
-[[Libdl]]
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+
+[[deps.Libdl]]
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
-[[Logging]]
+[[deps.Logging]]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
-[[Markdown]]
+[[deps.Markdown]]
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
-[[Mmap]]
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+
+[[deps.Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
 
-[[Parsers]]
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+
+[[deps.Parsers]]
 deps = ["Dates", "Test"]
 git-tree-sha1 = "0139ba59ce9bc680e2925aec5b7db79065d60556"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
 version = "0.3.10"
 
-[[Pkg]]
-deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
-[[Printf]]
+[[deps.Printf]]
 deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
-[[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets"]
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
-[[Random]]
-deps = ["Serialization"]
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
 uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
-[[SHA]]
+[[deps.SHA]]
 uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
-[[Serialization]]
+[[deps.Serialization]]
 uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
-[[Sockets]]
+[[deps.Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
-[[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
-[[UUIDs]]
+[[deps.UUIDs]]
 deps = ["Random", "SHA"]
 uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
-[[Unicode]]
+[[deps.Unicode]]
 uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
diff --git a/test/fixtures/WackyOptions/.github/workflows/CI.yml b/test/fixtures/WackyOptions/.github/workflows/CI.yml
index 6a82e514..5ff3c09d 100644
--- a/test/fixtures/WackyOptions/.github/workflows/CI.yml
+++ b/test/fixtures/WackyOptions/.github/workflows/CI.yml
@@ -19,7 +19,7 @@ jobs:
       matrix:
         version:
           - '1.2'
-          - '1.5'
+          - '1.7'
           - 'nightly'
         os:
         arch:
diff --git a/test/fixtures/WackyOptions/Project.toml b/test/fixtures/WackyOptions/Project.toml
index c1ac4eea..b6191026 100644
--- a/test/fixtures/WackyOptions/Project.toml
+++ b/test/fixtures/WackyOptions/Project.toml
@@ -1,5 +1,5 @@
 name = "WackyOptions"
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 authors = ["tester"]
 version = "1.0.0"
 
diff --git a/test/fixtures/WackyOptions/docs/Manifest.toml b/test/fixtures/WackyOptions/docs/Manifest.toml
index da4ab1fe..e9d524d8 100644
--- a/test/fixtures/WackyOptions/docs/Manifest.toml
+++ b/test/fixtures/WackyOptions/docs/Manifest.toml
@@ -1,98 +1,149 @@
 # This file is machine-generated - editing it directly is not advised
 
-[[Base64]]
+julia_version = "1.7.1"
+manifest_format = "2.0"
+
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
-[[Dates]]
+[[deps.Dates]]
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
-[[Distributed]]
-deps = ["Random", "Serialization", "Sockets"]
-uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
-
-[[DocStringExtensions]]
+[[deps.DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
 git-tree-sha1 = "88bb0edb352b16608036faadcc071adda068582a"
 uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
 version = "0.8.1"
 
-[[Documenter]]
+[[deps.Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
 git-tree-sha1 = "0be9bf63e854a2408c2ecd3c600d68d4d87d8a73"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 version = "0.24.2"
 
-[[InteractiveUtils]]
+[[deps.Downloads]]
+deps = ["ArgTools", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+
+[[deps.InteractiveUtils]]
 deps = ["Markdown"]
 uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
-[[JSON]]
+[[deps.JSON]]
 deps = ["Dates", "Mmap", "Parsers", "Unicode"]
 git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
 uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 version = "0.21.0"
 
-[[LibGit2]]
-deps = ["Printf"]
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
 uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
 
-[[Libdl]]
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+
+[[deps.Libdl]]
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
-[[Logging]]
+[[deps.Logging]]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
-[[Markdown]]
+[[deps.Markdown]]
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
-[[Mmap]]
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+
+[[deps.Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
 
-[[Parsers]]
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+
+[[deps.Parsers]]
 deps = ["Dates", "Test"]
 git-tree-sha1 = "0139ba59ce9bc680e2925aec5b7db79065d60556"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
 version = "0.3.10"
 
-[[Pkg]]
-deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
-[[Printf]]
+[[deps.Printf]]
 deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
-[[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets"]
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
-[[Random]]
-deps = ["Serialization"]
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
 uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
-[[SHA]]
+[[deps.SHA]]
 uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
-[[Serialization]]
+[[deps.Serialization]]
 uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
-[[Sockets]]
+[[deps.Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
-[[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
-[[UUIDs]]
+[[deps.UUIDs]]
 deps = ["Random", "SHA"]
 uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
-[[Unicode]]
+[[deps.Unicode]]
 uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
 
-[[WackyOptions]]
+[[deps.WackyOptions]]
 path = ".."
-uuid = "5b7e9947-ddc0-4b3f-9b55-0d8042f74170"
+uuid = "c51a4d33-e9a4-4efb-a257-e0de888ecc28"
 version = "1.0.0"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
diff --git a/test/fixtures/WackyOptions/test/Manifest.toml b/test/fixtures/WackyOptions/test/Manifest.toml
index ac58105f..e07c83f5 100644
--- a/test/fixtures/WackyOptions/test/Manifest.toml
+++ b/test/fixtures/WackyOptions/test/Manifest.toml
@@ -1,33 +1,32 @@
 # This file is machine-generated - editing it directly is not advised
 
-[[Base64]]
-uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
+julia_version = "1.7.1"
+manifest_format = "2.0"
 
-[[Distributed]]
-deps = ["Random", "Serialization", "Sockets"]
-uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
+[[deps.Base64]]
+uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
-[[InteractiveUtils]]
+[[deps.InteractiveUtils]]
 deps = ["Markdown"]
 uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 
-[[Logging]]
+[[deps.Logging]]
 uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
-[[Markdown]]
+[[deps.Markdown]]
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
-[[Random]]
-deps = ["Serialization"]
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
 uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
-[[Serialization]]
-uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+[[deps.SHA]]
+uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 
-[[Sockets]]
-uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
+[[deps.Serialization]]
+uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
-[[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/test/reference.jl b/test/reference.jl
index 61ee4a65..69bcc8ed 100644
--- a/test/reference.jl
+++ b/test/reference.jl
@@ -65,7 +65,7 @@ function pin_documenter(project_dir::AbstractString)
     toml = joinpath(project_dir, "Project.toml")
     project = TOML.parsefile(toml)
     filter!(p -> p.first == "Documenter", project["deps"])
-    open(io -> TOML.print(io, project), toml, "w")
+    PT.write_project(toml, project)
 end
 
 function test_all(pkg::AbstractString; kwargs...)
diff --git a/test/runtests.jl b/test/runtests.jl
index 648fb5a5..e44a2af2 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,10 +1,11 @@
-using Base: contractuser
+using Base: UUID, contractuser
 using Base.Filesystem: path_separator
 
 using LibGit2: LibGit2, GitCommit, GitRemote, GitRepo
 using Pkg: Pkg, PackageSpec, TOML
 using Random: Random, randstring
 using Test: @test, @testset, @test_broken, @test_logs, @test_throws
+using UUIDs: uuid4
 
 using DeepDiffs: deepdiff
 using Mocking
@@ -27,7 +28,10 @@ pkgname() = titlecase(randstring('A':'Z', 16))
 
 # Create a randomly named package with a template, and delete it afterwards.
 function with_pkg(f::Function, t::Template, pkg::AbstractString=pkgname())
-    @suppress t(pkg)
+    patch = @patch uuid4() = UUID("c51a4d33-e9a4-4efb-a257-e0de888ecc28")
+    @suppress apply(patch) do
+        t(pkg)
+    end 
     try
         f(pkg)
     finally
@@ -96,9 +100,9 @@ mktempdir() do dir
                 include("git.jl")
 
                 # Quite a bit of output depends on the Julia version,
-                # and the test fixtures are made with Julia 1.5.
+                # and the test fixtures are made with Julia 1.7.
                 # TODO: Keep this on the latest stable Julia version.
-                if VERSION.major == 1 && VERSION.minor == 5
+                if VERSION == v"1.7.1"
                     # Ideally we'd use `with_clean_gitconfig`, but it's way too slow.
                     branch = LibGit2.getconfig(
                         "init.defaultBranch",