diff --git a/Library/Homebrew/test/dev-cmd/determine-test-runners_spec.rb b/Library/Homebrew/test/dev-cmd/determine-test-runners_spec.rb
index c3e24cd988..7b024052e4 100644
--- a/Library/Homebrew/test/dev-cmd/determine-test-runners_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/determine-test-runners_spec.rb
@@ -11,13 +11,12 @@ describe "brew determine-test-runners" do
   let(:linux_runner) { "ubuntu-22.04" }
   # We need to make sure we write to a different path for each example.
   let(:github_output) { "#{TEST_TMPDIR}/github_output#{DetermineRunnerTestHelper.new.number}" }
-  let(:ephemeral_suffix) { "-12345-1" }
+  let(:ephemeral_suffix) { "-12345" }
   let(:runner_env) do
     {
       "HOMEBREW_LINUX_RUNNER"  => linux_runner,
       "HOMEBREW_MACOS_TIMEOUT" => "90",
       "GITHUB_RUN_ID"          => ephemeral_suffix.split("-").second,
-      "GITHUB_RUN_ATTEMPT"     => ephemeral_suffix.split("-").third,
     }.freeze
   end
   let(:all_runners) do
diff --git a/Library/Homebrew/test/github_runner_matrix_spec.rb b/Library/Homebrew/test/github_runner_matrix_spec.rb
index c9c0c361fe..1f22194f68 100644
--- a/Library/Homebrew/test/github_runner_matrix_spec.rb
+++ b/Library/Homebrew/test/github_runner_matrix_spec.rb
@@ -9,7 +9,6 @@ describe GitHubRunnerMatrix do
     allow(ENV).to receive(:fetch).with("HOMEBREW_MACOS_TIMEOUT").and_return("90")
     allow(ENV).to receive(:fetch).with("HOMEBREW_MACOS_BUILD_ON_GITHUB_RUNNER", "false").and_return("false")
     allow(ENV).to receive(:fetch).with("GITHUB_RUN_ID").and_return("12345")
-    allow(ENV).to receive(:fetch).with("GITHUB_RUN_ATTEMPT").and_return("1")
   end
 
   let(:newest_supported_macos) do