diff --git a/Library/Homebrew/build.rb b/Library/Homebrew/build.rb
index 3031765e65..d0ec6dacf7 100644
--- a/Library/Homebrew/build.rb
+++ b/Library/Homebrew/build.rb
@@ -208,7 +208,10 @@ class Build
 end
 
 begin
+  Homebrew.args = Homebrew::CLI::Parser.new.parse(ARGV.dup.freeze, ignore_invalid_options: true)
+
   args = Homebrew.install_args.parse
+
   error_pipe = UNIXSocket.open(ENV["HOMEBREW_ERROR_PIPE"], &:recv_io)
   error_pipe.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
 
diff --git a/Library/Homebrew/test.rb b/Library/Homebrew/test.rb
index 7167aabeb4..2936c20715 100644
--- a/Library/Homebrew/test.rb
+++ b/Library/Homebrew/test.rb
@@ -16,6 +16,8 @@ require "dev-cmd/test"
 TEST_TIMEOUT_SECONDS = 5 * 60
 
 begin
+  Homebrew.args = Homebrew::CLI::Parser.new.parse(ARGV.dup.freeze, ignore_invalid_options: true)
+
   args = Homebrew.test_args.parse
   error_pipe = UNIXSocket.open(ENV["HOMEBREW_ERROR_PIPE"], &:recv_io)
   error_pipe.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)