diff --git a/Dockerfile.test.yml b/Dockerfile.test.yml
index 79e6e7caa3..4b930db2c6 100644
--- a/Dockerfile.test.yml
+++ b/Dockerfile.test.yml
@@ -1,3 +1,3 @@
 sut:
   build: .
-  command: brew test-bot
+  command: env USER=root brew test-bot
diff --git a/Library/Homebrew/test/diagnostic_checks_spec.rb b/Library/Homebrew/test/diagnostic_checks_spec.rb
index 3f1dbcd44a..76ce1222db 100644
--- a/Library/Homebrew/test/diagnostic_checks_spec.rb
+++ b/Library/Homebrew/test/diagnostic_checks_spec.rb
@@ -24,6 +24,7 @@ describe Homebrew::Diagnostic::Checks do
   end
 
   specify "#check_access_directories" do
+    skip "User is root so everything is writable." if Process.euid.zero?
     begin
       dirs = [
         HOMEBREW_CACHE,
diff --git a/Library/Homebrew/test/pathname_spec.rb b/Library/Homebrew/test/pathname_spec.rb
index 5f846fde13..e1c6645bf9 100644
--- a/Library/Homebrew/test/pathname_spec.rb
+++ b/Library/Homebrew/test/pathname_spec.rb
@@ -118,6 +118,7 @@ describe Pathname do
 
   describe "#ensure_writable" do
     it "makes a file writable and restores permissions afterwards" do
+      skip "User is root so everything is writable." if Process.euid.zero?
       touch file
       chmod 0555, file
       expect(file).not_to be_writable