diff --git a/Library/Homebrew/test/utils/analytics_spec.rb b/Library/Homebrew/test/utils/analytics_spec.rb
new file mode 100644
index 0000000000..bb6cda0b12
--- /dev/null
+++ b/Library/Homebrew/test/utils/analytics_spec.rb
@@ -0,0 +1,88 @@
+require "utils/analytics"
+require "formula_installer"
+
+describe Utils::Analytics do
+  describe "::os_prefix_ci" do
+    context "when anonymous_os_prefix_ci is not set" do
+      before(:each) do
+        described_class.clear_anonymous_os_prefix_ci_cache
+      end
+
+      it "returns OS_VERSION and prefix when HOMEBREW_PREFIX is not /usr/local" do
+        stub_const("HOMEBREW_PREFIX", "blah")
+        expect(described_class.os_prefix_ci).to include("#{OS_VERSION}, non-/usr/local")
+      end
+
+      it "includes CI when ENV['CI'] is set" do
+        ENV["CI"] = "true"
+        expect(described_class.os_prefix_ci).to include("CI")
+      end
+
+      it "does not include prefix when HOMEBREW_PREFIX is /usr/local" do
+        stub_const("HOMEBREW_PREFIX", "/usr/local")
+        expect(described_class.os_prefix_ci).not_to include("non-/usr/local")
+      end
+    end
+  end
+
+  describe "::report_event" do
+    let(:f) { formula { url "foo-1.0" } }
+    let(:options) { FormulaInstaller.new(f).display_options(f) }
+    let(:action)  { "#{f.full_name} #{options}".strip }
+
+    context "when ENV vars is set" do
+      it "returns nil when HOMEBREW_NO_ANALYTICS is true" do
+        ENV["HOMEBREW_NO_ANALYTICS"] = "true"
+        expect(described_class.report_event("install", action)).to be_nil
+      end
+
+      it "returns nil when HOMEBREW_NO_ANALYTICS_THIS_RUN is true" do
+        ENV["HOMEBREW_NO_ANALYTICS_THIS_RUN"] = "true"
+        expect(described_class.report_event("install", action)).to be_nil
+      end
+
+      it "returns nil when HOMEBREW_ANALYTICS_DEBUG is true" do
+        ENV.delete("HOMEBREW_NO_ANALYTICS_THIS_RUN")
+        ENV.delete("HOMEBREW_NO_ANALYTICS")
+        ENV["HOMEBREW_ANALYTICS_DEBUG"] = "true"
+        expect(described_class.report_event("install", action)).to be_nil
+      end
+    end
+  end
+
+  describe "::report_build_error" do
+    context "when tap is installed" do
+      let(:err) { BuildError.new(f, "badprg", %w[arg1 arg2], {}) }
+      let(:f) { formula { url "foo-1.0" } }
+
+      it "reports event if BuildError raised for a formula with a public remote repository" do
+        allow_any_instance_of(Tap).to receive(:custom_remote?).and_return(false)
+        expect(described_class).to respond_to(:report_event)
+        described_class.report_build_error(err)
+      end
+
+      it "does not report event if BuildError raised for a formula with a private remote repository" do
+        expect(described_class.report_build_error(err)).to be_nil
+      end
+    end
+
+    context "when formula does not have a tap" do
+      let(:err) { BuildError.new(f, "badprg", %w[arg1 arg2], {}) }
+      let(:f) { double(Formula, name: "foo", path: "blah", tap: nil) }
+
+      it "does not report event if BuildError is raised" do
+        expect(described_class.report_build_error(err)).to be_nil
+      end
+    end
+
+    context "when tap for a formula is not installed" do
+      let(:err) { BuildError.new(f, "badprg", %w[arg1 arg2], {}) }
+      let(:f) { double(Formula, name: "foo", path: "blah", tap: CoreTap.instance) }
+
+      it "does not report event if BuildError is raised" do
+        allow_any_instance_of(Pathname).to receive(:directory?).and_return(false)
+        expect(described_class.report_build_error(err)).to be_nil
+      end
+    end
+  end
+end
diff --git a/Library/Homebrew/utils/analytics.rb b/Library/Homebrew/utils/analytics.rb
index a89995ba93..9766c14db3 100644
--- a/Library/Homebrew/utils/analytics.rb
+++ b/Library/Homebrew/utils/analytics.rb
@@ -3,6 +3,11 @@ require "erb"
 module Utils
   module Analytics
     class << self
+      def clear_anonymous_os_prefix_ci_cache
+        return unless instance_variable_defined?(:@anonymous_os_prefix_ci)
+        remove_instance_variable(:@anonymous_os_prefix_ci)
+      end
+
       def os_prefix_ci
         @anonymous_os_prefix_ci ||= begin
           os = OS_VERSION