diff --git a/.github/workflows/_elixir.yml b/.github/workflows/_elixir.yml
index 95bd4b57c..e7399d40c 100644
--- a/.github/workflows/_elixir.yml
+++ b/.github/workflows/_elixir.yml
@@ -39,6 +39,7 @@ jobs:
       - name: Run Tests
         env:
           E2E_DEFAULT_WAIT_SECONDS: 20
+          CI_ASSERT_RECEIVE_TIMEOUT_MS: 250
         run: |
           mix test --warnings-as-errors \
             --exclude flaky:true \
diff --git a/elixir/config/test.exs b/elixir/config/test.exs
index a6f309fee..cb3339e91 100644
--- a/elixir/config/test.exs
+++ b/elixir/config/test.exs
@@ -73,10 +73,18 @@ config :wallaby,
   js_logger: false,
   hackney_options: [timeout: 10_000, recv_timeout: 10_000]
 
-config :ex_unit,
-  formatters: [JUnitFormatter, ExUnit.CLIFormatter],
-  capture_log: true,
-  exclude: [:acceptance]
+ex_unit_config =
+  [
+    formatters: [JUnitFormatter, ExUnit.CLIFormatter],
+    capture_log: true,
+    exclude: [:acceptance]
+  ] ++
+    case System.get_env("CI_ASSERT_RECEIVE_TIMEOUT_MS") do
+      nil -> []
+      timeout -> [assert_receive_timeout: String.to_integer(timeout)]
+    end
+
+config :ex_unit, ex_unit_config
 
 # Initialize plugs at runtime for faster development compilation
 config :phoenix, :plug_init_mode, :runtime