diff --git a/spec/contexts_spec.rb b/spec/contexts_spec.rb
index 2fe477d1..dda3fcaf 100644
--- a/spec/contexts_spec.rb
+++ b/spec/contexts_spec.rb
@@ -1,28 +1,20 @@
 # frozen_string_literal: true
 
 describe Ferrum::Contexts do
-  # Chrome opens two `chrome://omnibox-popup.top-chrome/` (`browser_ui`) targets per
-  # browser context. Auto-attach runs with `waitForDebuggerOnStart`, so they arrive
-  # paused, and nothing resumes a type we don't track: left alone they stay attached
-  # and paused for the lifetime of the browser.
+  # Chrome opens `chrome://omnibox-popup.top-chrome/` (`browser_ui`) targets in every
+  # browser context (two up to Chrome 156, one since 157). Auto-attach runs with
+  # `waitForDebuggerOnStart`, so they arrive paused, and nothing resumes a type we don't
+  # track: left alone they stay attached and paused for the lifetime of the browser.
   describe ".new" do
     it "detaches from attached targets of a type it doesn't track" do
-      untracked = Concurrent::Array.new
-      detached = Concurrent::Array.new
-
-      attached_id = browser.client.on("Target.attachedToTarget") do |params|
-        type = params["targetInfo"]["type"]
-        untracked << params["sessionId"] unless described_class::ALLOWED_TARGET_TYPES.include?(type)
-      end
-      detached_id = browser.client.on("Target.detachedFromTarget") { |params| detached << params["sessionId"] }
-
-      browser.contexts.create.create_page
+      context = browser.contexts.create
+      context.create_page
 
-      wait(5).for { untracked.size }.to be >= 2
-      wait(5).for { untracked - detached }.to be_empty
-    ensure
-      browser.client.off("Target.attachedToTarget", attached_id)
-      browser.client.off("Target.detachedFromTarget", detached_id)
+      wait(5).for do
+        browser.client.command("Target.getTargets")["targetInfos"]
+               .select { |info| info["browserContextId"] == context.id && info["type"] == "browser_ui" }
+               .map { |info| info["attached"] }
+      end.to include(false).and(all(be(false)))
     end
   end