diff --git a/.gitlab/ci/rules.gitlab-ci.yml b/.gitlab/ci/rules.gitlab-ci.yml
index 95102b34b1238808df10ff1e05319bf741a89dcb..cb6c1b6fbe80b0089517f8489aeceaee1837db18 100644
--- a/.gitlab/ci/rules.gitlab-ci.yml
+++ b/.gitlab/ci/rules.gitlab-ci.yml
@@ -2172,7 +2172,12 @@
     - !reference [".prevent-tier-1", rules]
     - !reference [".qa:rules:e2e-blocking-base-after", rules]
     - <<: *if-dot-com-gitlab-org-schedule
-      variables: *qa-e2e-test-schedule-variables
+      variables:
+        <<: *qa-e2e-test-schedule-variables
+        COVERBAND_ENABLED: "true"
+        # https://gitlab.com/gitlab-org/gitlab/-/blob/master/babel.config.js
+        # This sets the environmental variable enabling `istanbul` plugin in Babel
+        BABEL_ENV: "istanbul"
 
 .qa:rules:e2e:perf-on-cng:
   rules:
diff --git a/.gitlab/ci/test-on-cng/main.gitlab-ci.yml b/.gitlab/ci/test-on-cng/main.gitlab-ci.yml
index af58d384615af3e31871f0436f22db12f09fbb8b..ed8dafe768ebe7db1a55d3f1cd65b15b4d0979f9 100644
--- a/.gitlab/ci/test-on-cng/main.gitlab-ci.yml
+++ b/.gitlab/ci/test-on-cng/main.gitlab-ci.yml
@@ -236,3 +236,9 @@ upload-test-runtime-data:
   extends:
     - .upload-test-runtime-data
     - .rules:report:upload-test-runtime-data
+
+process-e2e-coverage:
+  extends:
+    - .process-e2e-coverage
+  needs:
+    - job: cng-instance
diff --git a/.gitlab/ci/test-on-gdk/main.gitlab-ci.yml b/.gitlab/ci/test-on-gdk/main.gitlab-ci.yml
index 18cf745f1d01c7da2c3111f3bdde5485f64f2ea6..bb632c3e684381875d1613e990b0c44ff1e151e3 100644
--- a/.gitlab/ci/test-on-gdk/main.gitlab-ci.yml
+++ b/.gitlab/ci/test-on-gdk/main.gitlab-ci.yml
@@ -82,26 +82,26 @@ workflow:
     expire_in: 7 days
     when: always
 
-# ==========================================
-# Test stage
-# ==========================================
-
-gdk-instance:
+.gdk-instance:
   extends:
     - .gdk-qa-base
     - .with-parallel
   variables:
     QA_SCENARIO: Test::Instance::All
 
+# ==========================================
+# Test stage
+# ==========================================
+
 gdk-instance-ff-inverse:
-  extends: gdk-instance
+  extends: .gdk-instance
   variables:
     QA_FEATURE_FLAGS: $FEATURE_FLAGS
   rules:
     - !reference [.rules:test:feature-flags-set, rules]
 
 gdk-instance-gitaly-transactions:
-  extends: gdk-instance
+  extends: .gdk-instance
   variables:
     QA_GITALY_TRANSACTIONS_ENABLED: "true"
   rules:
@@ -111,7 +111,7 @@ gdk-instance-gitaly-transactions:
 # balancing. Adding 5s lag to 1 of the replicas to validate robustness of
 # the load balancer.
 gdk-instance-with-load-balancer:
-  extends: gdk-instance
+  extends: .gdk-instance
   variables:
     WITH_LOAD_BALANCER: "true"
   rules:
@@ -151,12 +151,6 @@ export-frontend-code-paths-mapping:
   extends:
     - .export-frontend-code-paths-mapping
 
-process-e2e-coverage:
-  extends:
-    - .process-e2e-coverage
-  needs:
-    - job: gdk-instance
-
 notify-slack:
   extends:
     - .notify-slack
diff --git a/.gitlab/ci/test-on-omnibus/main.gitlab-ci.yml b/.gitlab/ci/test-on-omnibus/main.gitlab-ci.yml
index 4e4aab73880a10bc8285d16b63213566a1598e50..84047457cb24aa5fbd9043d34c9c66b31bf18673 100644
--- a/.gitlab/ci/test-on-omnibus/main.gitlab-ci.yml
+++ b/.gitlab/ci/test-on-omnibus/main.gitlab-ci.yml
@@ -84,19 +84,6 @@ health-check:
     - if: $RUN_ALL_TESTS == "true"
     - if: $QA_SUITES =~ /Test::Instance::HealthCheck/
 
-# ========== instance ===========
-instance:
-  extends:
-    - .parallel
-    - .omnibus-e2e
-  variables:
-    QA_SCENARIO: Test::Instance::Image
-    QA_RUN_IN_PARALLEL: true
-  rules:
-    # gitlab-org/gitlab pipelines run instance suite in both gdk and cng deployments
-    - when: manual
-      allow_failure: true
-
 # ========== praefect ===========
 praefect:
   extends:
@@ -112,24 +99,6 @@ praefect:
     - !reference [.rules:test:smoke-for-omnibus-mr, rules]
     - if: $QA_SUITES =~ /Test::Instance::Create/
 
-# ========== gitaly transactions enabled ===========
-# https://docs.gitlab.com/ee/architecture/blueprints/gitaly_transaction_management/
-gitaly-transactions:
-  when: manual
-  extends:
-    - .parallel
-    - .omnibus-e2e
-    - .with-ignored-runtime-data
-  variables:
-    QA_SCENARIO: Test::Integration::Praefect
-    QA_SUITE_CLASS_NAME: Test::Instance::Create # overrides default 'All' suite to only run 'Create' group specs
-    QA_CAN_TEST_PRAEFECT: "true"
-    QA_GITALY_TRANSACTIONS_ENABLED: "true"
-    QA_RUN_IN_PARALLEL: true
-  rules:
-    - !reference [.rules:test:omnibus-base, rules]
-    - if: $QA_SUITES =~ /Test::Instance::Create/
-
 # ========== gitaly reftables backend ===========
 # Verifies that E2E tests that interact with the gitaly backend work when the reftables backend is in use
 # https://about.gitlab.com/blog/2024/05/30/a-beginners-guide-to-the-git-reftable-format/
@@ -245,29 +214,6 @@ mattermost:
     - !reference [.rules:test:omnibus-base, rules]
     - if: $QA_SUITES =~ /Test::Integration::Mattermost/
 
-registry:
-  extends:
-    - .omnibus-e2e
-  variables:
-    QA_SCENARIO: Test::Integration::Registry
-  rules:
-    - !reference [.rules:test:omnibus-base, rules]
-    - if: $QA_SUITES =~ /Test::Integration::Registry/
-
-# ========== Relative url ===========
-# Only run a subset of smoke suite
-relative-url:
-  extends:
-    - .parallel
-    - .omnibus-e2e
-    - .with-ignored-runtime-data
-  variables:
-    QA_SCENARIO: Test::Instance::RelativeUrl
-    QA_RSPEC_TAGS: --tag smoke --tag ~orchestrated --tag ~skip_live_env
-  rules:
-    - !reference [.rules:test:omnibus-base, rules]
-    - if: $QA_SUITES =~ /Test::Instance::All/
-
 repository-storage:
   extends:
     - .omnibus-e2e
diff --git a/qa/qa/scenario/test/instance/all.rb b/qa/qa/scenario/test/instance/all.rb
index b9c2097b688f667ddbc777a0438b6a41955a2b76..3c8d6dbd1e0447472d953150af9ebc526d0b0c7f 100644
--- a/qa/qa/scenario/test/instance/all.rb
+++ b/qa/qa/scenario/test/instance/all.rb
@@ -13,8 +13,8 @@ class All < Template
           include SharedAttributes
 
           pipeline_mappings test_on_cng: %w[cng-instance],
-            test_on_gdk: %w[gdk-instance gdk-instance-gitaly-transactions gdk-instance-ff-inverse],
-            test_on_omnibus: %w[instance git-sha256-repositories relative-url]
+            test_on_gdk: %w[gdk-instance-gitaly-transactions gdk-instance-ff-inverse],
+            test_on_omnibus: %w[git-sha256-repositories]
         end
       end
     end
diff --git a/qa/qa/scenario/test/instance/create.rb b/qa/qa/scenario/test/instance/create.rb
index bc95092012f4a26e039bbf0565a0c78bde2c3b42..20829e98351a1a09a7878f5c7418cfeff9f0c108 100644
--- a/qa/qa/scenario/test/instance/create.rb
+++ b/qa/qa/scenario/test/instance/create.rb
@@ -7,7 +7,7 @@ module Instance
         class Create < All
           spec_glob_pattern "qa/specs/features/**/3_create/**/*_spec.rb"
 
-          pipeline_mappings test_on_omnibus: %w[praefect gitaly-transactions gitaly-reftables-backend]
+          pipeline_mappings test_on_omnibus: %w[praefect gitaly-reftables-backend]
         end
       end
     end
diff --git a/qa/qa/scenario/test/integration/registry.rb b/qa/qa/scenario/test/integration/registry.rb
index 3deb89b8048381207e1ee132be729810f59ef15d..7a5cbb810f69c6da141fd87c981ec45500566e17 100644
--- a/qa/qa/scenario/test/integration/registry.rb
+++ b/qa/qa/scenario/test/integration/registry.rb
@@ -7,7 +7,7 @@ module Integration
         class Registry < Test::Instance::All
           tags :registry
 
-          pipeline_mappings test_on_cng: %w[cng-registry], test_on_omnibus: %w[registry]
+          pipeline_mappings test_on_cng: %w[cng-registry]
         end
       end
     end