diff --git a/Library/Homebrew/test/cmd/outdated_spec.rb b/Library/Homebrew/test/cmd/outdated_spec.rb
index c2af5d43b9aa2..1c56e88dcc0d9 100644
--- a/Library/Homebrew/test/cmd/outdated_spec.rb
+++ b/Library/Homebrew/test/cmd/outdated_spec.rb
@@ -6,7 +6,9 @@
 RSpec.describe Homebrew::Cmd::Outdated do
   it_behaves_like "parseable arguments"
 
-  it "outputs JSON", :integration_test do
+  # json v2.8.1 is inconsistent it how it renders empty arrays,
+  # for now we are skipping generic tests.
+  it "outputs JSON", :integration_test, :skip_generic do
     setup_test_formula "testball"
     (HOMEBREW_CELLAR/"testball/0.0.1/foo").mkpath
 
diff --git a/Library/Homebrew/test/spec_helper.rb b/Library/Homebrew/test/spec_helper.rb
index 831d8f7404071..a95057764540d 100644
--- a/Library/Homebrew/test/spec_helper.rb
+++ b/Library/Homebrew/test/spec_helper.rb
@@ -149,6 +149,10 @@
     skip "Not running on macOS." unless OS.mac?
   end
 
+  config.before(:each, :skip_generic) do
+    skip "Not running on generic OS." unless OS.mac? || OS.linux?
+  end
+
   config.before(:each, :needs_ci) do
     skip "Not running on CI." unless ENV["CI"]
   end