diff --git a/sentry-ruby/2873/Gemfile b/sentry-ruby/2873/Gemfile
new file mode 100644
index 0000000..12a6cd7
--- /dev/null
+++ b/sentry-ruby/2873/Gemfile
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "rails", "~> 8.0"
+gem "sentry-ruby", "~> 6.4.0"
+gem "sentry-rails", "~> 6.4.0"
+gem "puma"
diff --git a/sentry-ruby/2873/Gemfile.lock b/sentry-ruby/2873/Gemfile.lock
new file mode 100644
index 0000000..2b7eb62
--- /dev/null
+++ b/sentry-ruby/2873/Gemfile.lock
@@ -0,0 +1,312 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    action_text-trix (2.1.16)
+      railties
+    actioncable (8.1.2)
+      actionpack (= 8.1.2)
+      activesupport (= 8.1.2)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+      zeitwerk (~> 2.6)
+    actionmailbox (8.1.2)
+      actionpack (= 8.1.2)
+      activejob (= 8.1.2)
+      activerecord (= 8.1.2)
+      activestorage (= 8.1.2)
+      activesupport (= 8.1.2)
+      mail (>= 2.8.0)
+    actionmailer (8.1.2)
+      actionpack (= 8.1.2)
+      actionview (= 8.1.2)
+      activejob (= 8.1.2)
+      activesupport (= 8.1.2)
+      mail (>= 2.8.0)
+      rails-dom-testing (~> 2.2)
+    actionpack (8.1.2)
+      actionview (= 8.1.2)
+      activesupport (= 8.1.2)
+      nokogiri (>= 1.8.5)
+      rack (>= 2.2.4)
+      rack-session (>= 1.0.1)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+      useragent (~> 0.16)
+    actiontext (8.1.2)
+      action_text-trix (~> 2.1.15)
+      actionpack (= 8.1.2)
+      activerecord (= 8.1.2)
+      activestorage (= 8.1.2)
+      activesupport (= 8.1.2)
+      globalid (>= 0.6.0)
+      nokogiri (>= 1.8.5)
+    actionview (8.1.2)
+      activesupport (= 8.1.2)
+      builder (~> 3.1)
+      erubi (~> 1.11)
+      rails-dom-testing (~> 2.2)
+      rails-html-sanitizer (~> 1.6)
+    activejob (8.1.2)
+      activesupport (= 8.1.2)
+      globalid (>= 0.3.6)
+    activemodel (8.1.2)
+      activesupport (= 8.1.2)
+    activerecord (8.1.2)
+      activemodel (= 8.1.2)
+      activesupport (= 8.1.2)
+      timeout (>= 0.4.0)
+    activestorage (8.1.2)
+      actionpack (= 8.1.2)
+      activejob (= 8.1.2)
+      activerecord (= 8.1.2)
+      activesupport (= 8.1.2)
+      marcel (~> 1.0)
+    activesupport (8.1.2)
+      base64
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      json
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    base64 (0.3.0)
+    bigdecimal (4.0.1)
+    builder (3.3.0)
+    concurrent-ruby (1.3.6)
+    connection_pool (3.0.2)
+    crass (1.0.6)
+    date (3.5.1)
+    drb (2.2.3)
+    erb (6.0.2)
+    erubi (1.13.1)
+    globalid (1.3.0)
+      activesupport (>= 6.1)
+    i18n (1.14.8)
+      concurrent-ruby (~> 1.0)
+    io-console (0.8.2)
+    irb (1.17.0)
+      pp (>= 0.6.0)
+      prism (>= 1.3.0)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
+    json (2.18.1)
+    logger (1.7.0)
+    loofah (2.25.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.12.0)
+    mail (2.9.0)
+      logger
+      mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.1.0)
+    mini_mime (1.1.5)
+    minitest (6.0.2)
+      drb (~> 2.0)
+      prism (~> 1.5)
+    net-imap (0.6.3)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.2)
+      timeout
+    net-smtp (0.5.1)
+      net-protocol
+    nio4r (2.7.5)
+    nokogiri (1.19.1-aarch64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.19.1-aarch64-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.19.1-arm-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.19.1-arm-linux-musl)
+      racc (~> 1.4)
+    nokogiri (1.19.1-arm64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.19.1-x86_64-darwin)
+      racc (~> 1.4)
+    nokogiri (1.19.1-x86_64-linux-gnu)
+      racc (~> 1.4)
+    nokogiri (1.19.1-x86_64-linux-musl)
+      racc (~> 1.4)
+    pp (0.6.3)
+      prettyprint
+    prettyprint (0.2.0)
+    prism (1.9.0)
+    psych (5.3.1)
+      date
+      stringio
+    puma (7.2.0)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.5)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rackup (2.3.1)
+      rack (>= 3)
+    rails (8.1.2)
+      actioncable (= 8.1.2)
+      actionmailbox (= 8.1.2)
+      actionmailer (= 8.1.2)
+      actionpack (= 8.1.2)
+      actiontext (= 8.1.2)
+      actionview (= 8.1.2)
+      activejob (= 8.1.2)
+      activemodel (= 8.1.2)
+      activerecord (= 8.1.2)
+      activestorage (= 8.1.2)
+      activesupport (= 8.1.2)
+      bundler (>= 1.15.0)
+      railties (= 8.1.2)
+    rails-dom-testing (2.3.0)
+      activesupport (>= 5.0.0)
+      minitest
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.7.0)
+      loofah (~> 2.25)
+      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
+    railties (8.1.2)
+      actionpack (= 8.1.2)
+      activesupport (= 8.1.2)
+      irb (~> 1.13)
+      rackup (>= 1.0.0)
+      rake (>= 12.2)
+      thor (~> 1.0, >= 1.2.2)
+      tsort (>= 0.2)
+      zeitwerk (~> 2.6)
+    rake (13.3.1)
+    rdoc (7.2.0)
+      erb
+      psych (>= 4.0.0)
+      tsort
+    reline (0.6.3)
+      io-console (~> 0.5)
+    securerandom (0.4.1)
+    sentry-rails (6.4.0)
+      railties (>= 5.2.0)
+      sentry-ruby (~> 6.4.0)
+    sentry-ruby (6.4.0)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      logger
+    stringio (3.2.0)
+    thor (1.5.0)
+    timeout (0.6.0)
+    tsort (0.2.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    uri (1.1.1)
+    useragent (0.16.11)
+    websocket-driver (0.8.0)
+      base64
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.7.5)
+
+PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
+
+DEPENDENCIES
+  puma
+  rails (~> 8.0)
+  sentry-rails (~> 6.4.0)
+  sentry-ruby (~> 6.4.0)
+
+CHECKSUMS
+  action_text-trix (2.1.16) sha256=f645a2c21821b8449fd1d6770708f4031c91a2eedf9ef476e9be93c64e703a8a
+  actioncable (8.1.2) sha256=dc31efc34cca9cdefc5c691ddb8b4b214c0ea5cd1372108cbc1377767fb91969
+  actionmailbox (8.1.2) sha256=058b2fb1980e5d5a894f675475fcfa45c62631103d5a2596d9610ec81581889b
+  actionmailer (8.1.2) sha256=f4c1d2060f653bfe908aa7fdc5a61c0e5279670de992146582f2e36f8b9175e9
+  actionpack (8.1.2) sha256=ced74147a1f0daafaa4bab7f677513fd4d3add574c7839958f7b4f1de44f8423
+  actiontext (8.1.2) sha256=0bf57da22a9c19d970779c3ce24a56be31b51c7640f2763ec64aa72e358d2d2d
+  actionview (8.1.2) sha256=80455b2588911c9b72cec22d240edacb7c150e800ef2234821269b2b2c3e2e5b
+  activejob (8.1.2) sha256=908dab3713b101859536375819f4156b07bdf4c232cc645e7538adb9e302f825
+  activemodel (8.1.2) sha256=e21358c11ce68aed3f9838b7e464977bc007b4446c6e4059781e1d5c03bcf33e
+  activerecord (8.1.2) sha256=acfbe0cadfcc50fa208011fe6f4eb01cae682ebae0ef57145ba45380c74bcc44
+  activestorage (8.1.2) sha256=8a63a48c3999caeee26a59441f813f94681fc35cc41aba7ce1f836add04fba76
+  activesupport (8.1.2) sha256=88842578ccd0d40f658289b0e8c842acfe9af751afee2e0744a7873f50b6fdae
+  base64 (0.3.0) sha256=27337aeabad6ffae05c265c450490628ef3ebd4b67be58257393227588f5a97b
+  bigdecimal (4.0.1) sha256=8b07d3d065a9f921c80ceaea7c9d4ae596697295b584c296fe599dd0ad01c4a7
+  builder (3.3.0) sha256=497918d2f9dca528fdca4b88d84e4ef4387256d984b8154e9d5d3fe5a9c8835f
+  concurrent-ruby (1.3.6) sha256=6b56837e1e7e5292f9864f34b69c5a2cbc75c0cf5338f1ce9903d10fa762d5ab
+  connection_pool (3.0.2) sha256=33fff5ba71a12d2aa26cb72b1db8bba2a1a01823559fb01d29eb74c286e62e0a
+  crass (1.0.6) sha256=dc516022a56e7b3b156099abc81b6d2b08ea1ed12676ac7a5657617f012bd45d
+  date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0
+  drb (2.2.3) sha256=0b00d6fdb50995fe4a45dea13663493c841112e4068656854646f418fda13373
+  erb (6.0.2) sha256=9fe6264d44f79422c87490a1558479bd0e7dad4dd0e317656e67ea3077b5242b
+  erubi (1.13.1) sha256=a082103b0885dbc5ecf1172fede897f9ebdb745a4b97a5e8dc63953db1ee4ad9
+  globalid (1.3.0) sha256=05c639ad6eb4594522a0b07983022f04aa7254626ab69445a0e493aa3786ff11
+  i18n (1.14.8) sha256=285778639134865c5e0f6269e0b818256017e8cde89993fdfcbfb64d088824a5
+  io-console (0.8.2) sha256=d6e3ae7a7cc7574f4b8893b4fca2162e57a825b223a177b7afa236c5ef9814cc
+  irb (1.17.0) sha256=168c4ddb93d8a361a045c41d92b2952c7a118fa73f23fe14e55609eb7a863aae
+  json (2.18.1) sha256=fe112755501b8d0466b5ada6cf50c8c3f41e897fa128ac5d263ec09eedc9f986
+  logger (1.7.0) sha256=196edec7cc44b66cfb40f9755ce11b392f21f7967696af15d274dde7edff0203
+  loofah (2.25.0) sha256=df5ed7ac3bac6a4ec802df3877ee5cc86d027299f8952e6243b3dac446b060e6
+  mail (2.9.0) sha256=6fa6673ecd71c60c2d996260f9ee3dd387d4673b8169b502134659ece6d34941
+  marcel (1.1.0) sha256=fdcfcfa33cc52e93c4308d40e4090a5d4ea279e160a7f6af988260fa970e0bee
+  mini_mime (1.1.5) sha256=8681b7e2e4215f2a159f9400b5816d85e9d8c6c6b491e96a12797e798f8bccef
+  minitest (6.0.2) sha256=db6e57956f6ecc6134683b4c87467d6dd792323c7f0eea7b93f66bd284adbc3d
+  net-imap (0.6.3) sha256=9bab75f876596d09ee7bf911a291da478e0cd6badc54dfb82874855ccc82f2ad
+  net-pop (0.1.2) sha256=848b4e982013c15b2f0382792268763b748cce91c9e91e36b0f27ed26420dff3
+  net-protocol (0.2.2) sha256=aa73e0cba6a125369de9837b8d8ef82a61849360eba0521900e2c3713aa162a8
+  net-smtp (0.5.1) sha256=ed96a0af63c524fceb4b29b0d352195c30d82dd916a42f03c62a3a70e5b70736
+  nio4r (2.7.5) sha256=6c90168e48fb5f8e768419c93abb94ba2b892a1d0602cb06eef16d8b7df1dca1
+  nokogiri (1.19.1-aarch64-linux-gnu) sha256=cfdb0eafd9a554a88f12ebcc688d2b9005f9fce42b00b970e3dc199587b27f32
+  nokogiri (1.19.1-aarch64-linux-musl) sha256=1e2150ab43c3b373aba76cd1190af7b9e92103564063e48c474f7600923620b5
+  nokogiri (1.19.1-arm-linux-gnu) sha256=0a39ed59abe3bf279fab9dd4c6db6fe8af01af0608f6e1f08b8ffa4e5d407fa3
+  nokogiri (1.19.1-arm-linux-musl) sha256=3a18e559ee499b064aac6562d98daab3d39ba6cbb4074a1542781b2f556db47d
+  nokogiri (1.19.1-arm64-darwin) sha256=dfe2d337e6700eac47290407c289d56bcf85805d128c1b5a6434ddb79731cb9e
+  nokogiri (1.19.1-x86_64-darwin) sha256=7093896778cc03efb74b85f915a775862730e887f2e58d6921e3fa3d981e68bf
+  nokogiri (1.19.1-x86_64-linux-gnu) sha256=1a4902842a186b4f901078e692d12257678e6133858d0566152fe29cdb98456a
+  nokogiri (1.19.1-x86_64-linux-musl) sha256=4267f38ad4fc7e52a2e7ee28ed494e8f9d8eb4f4b3320901d55981c7b995fc23
+  pp (0.6.3) sha256=2951d514450b93ccfeb1df7d021cae0da16e0a7f95ee1e2273719669d0ab9df6
+  prettyprint (0.2.0) sha256=2bc9e15581a94742064a3cc8b0fb9d45aae3d03a1baa6ef80922627a0766f193
+  prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85
+  psych (5.3.1) sha256=eb7a57cef10c9d70173ff74e739d843ac3b2c019a003de48447b2963d81b1974
+  puma (7.2.0) sha256=bf8ef4ab514a4e6d4554cb4326b2004eba5036ae05cf765cfe51aba9706a72a8
+  racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
+  rack (3.2.5) sha256=4cbd0974c0b79f7a139b4812004a62e4c60b145cba76422e288ee670601ed6d3
+  rack-session (2.1.1) sha256=0b6dc07dea7e4b583f58a48e8b806d4c9f1c6c9214ebc202ec94562cbea2e4e9
+  rack-test (2.2.0) sha256=005a36692c306ac0b4a9350355ee080fd09ddef1148a5f8b2ac636c720f5c463
+  rackup (2.3.1) sha256=6c79c26753778e90983761d677a48937ee3192b3ffef6bc963c0950f94688868
+  rails (8.1.2) sha256=5069061b23dfa8706b9f0159ae8b9d35727359103178a26962b868a680ba7d95
+  rails-dom-testing (2.3.0) sha256=8acc7953a7b911ca44588bf08737bc16719f431a1cc3091a292bca7317925c1d
+  rails-html-sanitizer (1.7.0) sha256=28b145cceaf9cc214a9874feaa183c3acba036c9592b19886e0e45efc62b1e89
+  railties (8.1.2) sha256=1289ece76b4f7668fc46d07e55cc992b5b8751f2ad85548b7da351b8c59f8055
+  rake (13.3.1) sha256=8c9e89d09f66a26a01264e7e3480ec0607f0c497a861ef16063604b1b08eb19c
+  rdoc (7.2.0) sha256=8650f76cd4009c3b54955eb5d7e3a075c60a57276766ebf36f9085e8c9f23192
+  reline (0.6.3) sha256=1198b04973565b36ec0f11542ab3f5cfeeec34823f4e54cebde90968092b1835
+  securerandom (0.4.1) sha256=cc5193d414a4341b6e225f0cb4446aceca8e50d5e1888743fac16987638ea0b1
+  sentry-rails (6.4.0) sha256=ad0ebbb2dc331d3488561f6245cdcf6709768cfd2c93ef59f73c6675c7a8f93c
+  sentry-ruby (6.4.0) sha256=562bee79aea8f92825ac9df3ea01cc7788f9170d382f8d38947895280dc3be06
+  stringio (3.2.0) sha256=c37cb2e58b4ffbd33fe5cd948c05934af997b36e0b6ca6fdf43afa234cf222e1
+  thor (1.5.0) sha256=e3a9e55fe857e44859ce104a84675ab6e8cd59c650a49106a05f55f136425e73
+  timeout (0.6.0) sha256=6d722ad619f96ee383a0c557ec6eb8c4ecb08af3af62098a0be5057bf00de1af
+  tsort (0.2.0) sha256=9650a793f6859a43b6641671278f79cfead60ac714148aabe4e3f0060480089f
+  tzinfo (2.0.6) sha256=8daf828cc77bcf7d63b0e3bdb6caa47e2272dcfaf4fbfe46f8c3a9df087a829b
+  uri (1.1.1) sha256=379fa58d27ffb1387eaada68c749d1426738bd0f654d812fcc07e7568f5c57c6
+  useragent (0.16.11) sha256=700e6413ad4bb954bb63547fa098dddf7b0ebe75b40cc6f93b8d54255b173844
+  websocket-driver (0.8.0) sha256=ed0dba4b943c22f17f9a734817e808bc84cdce6a7e22045f5315aa57676d4962
+  websocket-extensions (0.1.5) sha256=1c6ba63092cda343eb53fc657110c71c754c56484aad42578495227d717a8241
+  zeitwerk (2.7.5) sha256=d8da92128c09ea6ec62c949011b00ed4a20242b255293dd66bf41545398f73dd
+
+BUNDLED WITH
+  4.0.3
diff --git a/sentry-ruby/2873/README.md b/sentry-ruby/2873/README.md
new file mode 100644
index 0000000..a639ce3
--- /dev/null
+++ b/sentry-ruby/2873/README.md
@@ -0,0 +1,49 @@
+# Reproduction for sentry-ruby#2873
+
+**Issue:** https://github.com/getsentry/sentry-ruby/issues/2873
+
+## Description
+
+`http.server.request.time_in_queue` is never captured in Rails apps because the
+`Sentry::Rails::CaptureExceptions#start_transaction` method overrides the parent
+`Sentry::Rack::CaptureExceptions#start_transaction` without including the queue
+time capture logic added in [PR #2838](https://github.com/getsentry/sentry-ruby/pull/2838).
+
+## Steps to Reproduce
+
+1. Install dependencies:
+   ```bash
+   bundle install
+   ```
+
+2. Run the reproduction:
+   ```bash
+   ruby test_queue_time.rb
+   ```
+
+## Expected Behavior
+
+The `before_send_transaction` callback should show that `http.server.request.time_in_queue`
+is present in the transaction data with a value of ~100ms.
+
+## Actual Behavior
+
+The output shows:
+```
+BUG: http.server.request.time_in_queue is MISSING
+     The Rails CaptureExceptions#start_transaction
+     overrides the Rack parent without queue time logic.
+```
+
+## Root Cause
+
+- The Rack parent class (`sentry-ruby/lib/sentry/rack/capture_exceptions.rb`) calls
+  `extract_queue_time(env)` at the end of `start_transaction` and sets the data on the transaction.
+- The Rails subclass (`sentry-rails/lib/sentry/rails/capture_exceptions.rb`) completely
+  overrides `start_transaction` without calling `super` or including the queue time logic.
+
+## Environment
+- Ruby: 4.0.1
+- sentry-ruby: 6.4.0
+- sentry-rails: 6.4.0
+- Rails: ~> 8.0
diff --git a/sentry-ruby/2873/app/controllers/application_controller.rb b/sentry-ruby/2873/app/controllers/application_controller.rb
new file mode 100644
index 0000000..7944f9f
--- /dev/null
+++ b/sentry-ruby/2873/app/controllers/application_controller.rb
@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+class ApplicationController < ActionController::Base
+end
diff --git a/sentry-ruby/2873/app/controllers/test_controller.rb b/sentry-ruby/2873/app/controllers/test_controller.rb
new file mode 100644
index 0000000..6dca353
--- /dev/null
+++ b/sentry-ruby/2873/app/controllers/test_controller.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class TestController < ApplicationController
+  def index
+    render plain: "OK"
+  end
+end
diff --git a/sentry-ruby/2873/bin/rails b/sentry-ruby/2873/bin/rails
new file mode 100755
index 0000000..efc0377
--- /dev/null
+++ b/sentry-ruby/2873/bin/rails
@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+APP_PATH = File.expand_path("../config/application", __dir__)
+require_relative "../config/boot"
+require "rails/commands"
diff --git a/sentry-ruby/2873/config.ru b/sentry-ruby/2873/config.ru
new file mode 100644
index 0000000..7e804ae
--- /dev/null
+++ b/sentry-ruby/2873/config.ru
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require_relative "config/environment"
+
+run Rails.application
diff --git a/sentry-ruby/2873/config/application.rb b/sentry-ruby/2873/config/application.rb
new file mode 100644
index 0000000..dfeec0c
--- /dev/null
+++ b/sentry-ruby/2873/config/application.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require_relative "boot"
+
+require "rails"
+require "action_controller/railtie"
+
+Bundler.require(*Rails.groups)
+
+module ReproApp
+  class Application < Rails::Application
+    config.load_defaults 8.0
+    config.eager_load = false
+    config.secret_key_base = "test_secret_key_base_for_reproduction"
+    config.logger = ActiveSupport::Logger.new($stdout)
+    config.log_level = :info
+  end
+end
diff --git a/sentry-ruby/2873/config/boot.rb b/sentry-ruby/2873/config/boot.rb
new file mode 100644
index 0000000..a29f4a4
--- /dev/null
+++ b/sentry-ruby/2873/config/boot.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "bundler/setup"
diff --git a/sentry-ruby/2873/config/environment.rb b/sentry-ruby/2873/config/environment.rb
new file mode 100644
index 0000000..e8173e0
--- /dev/null
+++ b/sentry-ruby/2873/config/environment.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require_relative "application"
+
+Rails.application.initialize!
diff --git a/sentry-ruby/2873/config/initializers/sentry.rb b/sentry-ruby/2873/config/initializers/sentry.rb
new file mode 100644
index 0000000..5b4cba8
--- /dev/null
+++ b/sentry-ruby/2873/config/initializers/sentry.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+Sentry.init do |config|
+  # DSN not needed - we intercept with before_send_transaction
+  config.dsn = "https://examplePublicKey@o0.ingest.sentry.io/0"
+
+  # Enable queue time capture (added in PR #2838)
+  config.capture_queue_time = true
+
+  # Capture all transactions
+  config.traces_sample_rate = 1.0
+
+  # Inspect transactions before they are sent
+  config.before_send_transaction = lambda do |event, _hint|
+    data = event.contexts.dig(:trace, :data) || {}
+    queue_time = data[:"http.server.request.time_in_queue"]
+
+    puts ""
+    puts "=" * 60
+    if queue_time
+      puts "PASS: Queue time captured: #{queue_time}ms"
+    else
+      # BUG: Rails subclass overrides start_transaction without
+      # calling extract_queue_time from the parent Rack class
+      puts "BUG: http.server.request.time_in_queue is MISSING"
+      puts "     The Rails CaptureExceptions#start_transaction"
+      puts "     overrides the Rack parent without queue time logic."
+    end
+    puts "=" * 60
+    puts ""
+
+    nil # don't actually send
+  end
+end
diff --git a/sentry-ruby/2873/config/routes.rb b/sentry-ruby/2873/config/routes.rb
new file mode 100644
index 0000000..5d1578b
--- /dev/null
+++ b/sentry-ruby/2873/config/routes.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Rails.application.routes.draw do
+  get "/test", to: "test#index"
+end
diff --git a/sentry-ruby/2873/test_queue_time.rb b/sentry-ruby/2873/test_queue_time.rb
new file mode 100755
index 0000000..8f8b939
--- /dev/null
+++ b/sentry-ruby/2873/test_queue_time.rb
@@ -0,0 +1,38 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Self-contained test that boots Rails inline and makes a request
+# with X-Request-Start header to check if queue time is captured.
+
+ENV["RAILS_ENV"] = "production"
+ENV["RAILS_LOG_TO_STDOUT"] = "1"
+
+require_relative "config/environment"
+
+require "net/http"
+
+app = Rails.application
+
+# Simulate a request with X-Request-Start header (as nginx/HAProxy would set)
+# Set to 100ms ago to simulate 100ms of queue time
+request_start_time = Time.now.to_f - 0.1
+
+env = Rack::MockRequest.env_for(
+  "/test",
+  "HTTP_X_REQUEST_START" => "t=#{request_start_time}"
+)
+
+puts "Making request with X-Request-Start header..."
+puts "  X-Request-Start: t=#{request_start_time}"
+puts "  Expected queue time: ~100ms"
+puts ""
+
+status, headers, body = app.call(env)
+body.close if body.respond_to?(:close)
+
+puts ""
+puts "Response status: #{status}"
+puts ""
+puts "If you see 'BUG: http.server.request.time_in_queue is MISSING'"
+puts "then the bug is confirmed — Rails overrides start_transaction"
+puts "without calling the queue time capture from the Rack parent class."