diff --git a/swift-update-safety.md b/swift-update-safety.md
deleted file mode 100644
index 40fd65a..0000000
--- a/swift-update-safety.md
+++ /dev/null
@@ -1,74 +0,0 @@
-# Test the safety of `swift package update`.
-
-Establish our sandbox.
-
-```
-RUN: rm -rf %t.dir
-```
-
-Create a dummy package.
-
-```
-RUN: mkdir -p %t.dir/Dep
-RUN: %{swift} package -C %t.dir/Dep init --type library
-RUN: git -C %t.dir/Dep init
-RUN: git -C %t.dir/Dep add -A
-RUN: git -C %t.dir/Dep config user.name "Test User"
-RUN: git -C %t.dir/Dep config user.email "test@user.com"
-RUN: git -C %t.dir/Dep commit -m "Initial commit."
-RUN: git -C %t.dir/Dep tag 1.0.0
-```
-
-Create the test package.
-
-```
-RUN: mkdir -p %t.dir/Cmd
-RUN: %{swift} package -C %t.dir/Cmd init --type executable
-RUN: echo "import PackageDescription" >  %t.dir/Cmd/Package.swift
-RUN: echo "let package = Package(" >>  %t.dir/Cmd/Package.swift
-RUN: echo "  name: \"Cmd\"," >>  %t.dir/Cmd/Package.swift
-RUN: echo "  dependencies: [.Package(url: \"../Dep\", Version(1,0,0))]" >>  %t.dir/Cmd/Package.swift
-RUN: echo ")" >>  %t.dir/Cmd/Package.swift
-```
-
-Build the test package.
-
-```
-RUN: mkdir -p %t.dir/Cmd
-RUN: %{swift} build -C %t.dir/Cmd 2>&1 | tee %t.build-log
-RUN: %{FileCheck} --check-prefix CHECK-BUILD-LOG --input-file %t.build-log %s
-
-CHECK-BUILD-LOG: Compile Swift Module 'Cmd'
-```
-
-Validate we can run `--update`.
-
-```
-RUN: %{swift} package -C %t.dir/Cmd update
-```
-
-Modify the sources of the dependency.
-
-```
-RUN: test -f %t.dir/Cmd/Packages/Dep-1.0.0/Sources/Dep.swift
-RUN: echo "INVALID CODE" >> %t.dir/Cmd/Packages/Dep-1.0.0/Sources/Dep.swift
-```
-
-Validate that `--update` errors out.
-
-```
-RUN: %{not} %{swift} package -C %t.dir/Cmd update
-```
-
-Stage the changes we made and verify it is still an error.
-
-```
-RUN: git -C %t.dir/Cmd/Packages/Dep-1.0.0 add Sources/Dep.swift
-RUN: %{not} %{swift} package -C %t.dir/Cmd update
-```
-
-Validate we still have our modified source.
-
-```
-RUN: grep "INVALID CODE" %t.dir/Cmd/Packages/Dep-1.0.0/Sources/Dep.swift
-```