diff --git a/test/bin/ci_phase_boot_and_test.sh b/test/bin/ci_phase_boot_and_test.sh
index 56aef1cb30..ce8e77d56e 100755
--- a/test/bin/ci_phase_boot_and_test.sh
+++ b/test/bin/ci_phase_boot_and_test.sh
@@ -116,6 +116,12 @@ elif [[ "${SCENARIO_SOURCES}" =~ .*releases.* ]]; then
     # hypervisor only ever holds the still-running scenarios' VMs.
     jobs_arg="-j 20"
     scenario_action="create-run-shutdown"
+    # Release scenarios run upgrade paths with LVMS workloads followed by
+    # full standard suites, which need more time than the default 30m robot
+    # timeout and 600s greenboot healthcheck — especially under I/O
+    # contention when many VMs boot and pull images in parallel.
+    export GREENBOOT_TIMEOUT=1200
+    export TEST_EXECUTION_TIMEOUT=60m
 fi
 
 TEST_OK=true
diff --git a/test/scenarios-bootc/el10/releases/el102-lrel@optional-sigstore.sh b/test/scenarios-bootc/el10/releases/el102-lrel@optional-sigstore.sh
index e657720bb7..fd25080fd0 100644
--- a/test/scenarios-bootc/el10/releases/el102-lrel@optional-sigstore.sh
+++ b/test/scenarios-bootc/el10/releases/el102-lrel@optional-sigstore.sh
@@ -2,15 +2,6 @@
 
 # Sourced from scenario.sh and uses functions defined there.
 
-# Each optional suite restarts MicroShift with its own kustomizePaths config,
-# adding ~10 minutes of restart overhead to the total execution time.
-# shellcheck disable=SC2034  # used elsewhere
-TEST_EXECUTION_TIMEOUT=60m
-
-# shellcheck disable=SC2034  # used elsewhere
-# Increase greenboot timeout for optional packages (more services to start)
-GREENBOOT_TIMEOUT=1200
-
 # Enable container signature verification for current release images,
 # including the optional components.
 # These are ec / rc / z-stream, thus must all to be signed.
diff --git a/test/scenarios-bootc/el10/releases/el102-lrel@optional.sh b/test/scenarios-bootc/el10/releases/el102-lrel@optional.sh
index 9a62cfccff..a17d90753d 100644
--- a/test/scenarios-bootc/el10/releases/el102-lrel@optional.sh
+++ b/test/scenarios-bootc/el10/releases/el102-lrel@optional.sh
@@ -2,15 +2,6 @@
 
 # Sourced from scenario.sh and uses functions defined there.
 
-# Each optional suite restarts MicroShift with its own kustomizePaths config,
-# adding ~10 minutes of restart overhead to the total execution time.
-# shellcheck disable=SC2034  # used elsewhere
-TEST_EXECUTION_TIMEOUT=60m
-
-# shellcheck disable=SC2034  # used elsewhere
-# Increase greenboot timeout for optional packages (more services to start)
-GREENBOOT_TIMEOUT=1200
-
 # Redefine network-related settings to use the dedicated network bridge
 VM_BRIDGE_IP="$(get_vm_bridge_ip "${VM_MULTUS_NETWORK}")"
 # shellcheck disable=SC2034  # used elsewhere
diff --git a/test/scenarios-bootc/el10/releases/el102@rpm-standard.sh b/test/scenarios-bootc/el10/releases/el102@rpm-standard.sh
index 816814dbfb..aaa0b7da23 100644
--- a/test/scenarios-bootc/el10/releases/el102@rpm-standard.sh
+++ b/test/scenarios-bootc/el10/releases/el102@rpm-standard.sh
@@ -13,9 +13,6 @@ export SKIP_GREENBOOT=true
 # did not want to spend the resources on a new VM.
 export TEST_RANDOMIZATION=none
 
-# Add extra timeout because it run both standard1 and standard2 suites.
-export TEST_EXECUTION_TIMEOUT=60m
-
 scenario_create_vms() {
     exit_if_brew_rpms_not_found
 
diff --git a/test/scenarios-bootc/el9/releases/el98-lrel@optional-sigstore.sh b/test/scenarios-bootc/el9/releases/el98-lrel@optional-sigstore.sh
index fc078e23c9..e13d318a43 100644
--- a/test/scenarios-bootc/el9/releases/el98-lrel@optional-sigstore.sh
+++ b/test/scenarios-bootc/el9/releases/el98-lrel@optional-sigstore.sh
@@ -2,15 +2,6 @@
 
 # Sourced from scenario.sh and uses functions defined there.
 
-# Each optional suite restarts MicroShift with its own kustomizePaths config,
-# adding ~10 minutes of restart overhead to the total execution time.
-# shellcheck disable=SC2034  # used elsewhere
-TEST_EXECUTION_TIMEOUT=60m
-
-# shellcheck disable=SC2034  # used elsewhere
-# Increase greenboot timeout for optional packages (more services to start)
-GREENBOOT_TIMEOUT=1200
-
 # Enable container signature verification for current release images,
 # including the optional components.
 # These are ec / rc / z-stream, thus must all to be signed.
diff --git a/test/scenarios-bootc/el9/releases/el98-lrel@optional.sh b/test/scenarios-bootc/el9/releases/el98-lrel@optional.sh
index a4d3782b8e..2d271f649d 100644
--- a/test/scenarios-bootc/el9/releases/el98-lrel@optional.sh
+++ b/test/scenarios-bootc/el9/releases/el98-lrel@optional.sh
@@ -2,15 +2,6 @@
 
 # Sourced from scenario.sh and uses functions defined there.
 
-# Each optional suite restarts MicroShift with its own kustomizePaths config,
-# adding ~10 minutes of restart overhead to the total execution time.
-# shellcheck disable=SC2034  # used elsewhere
-TEST_EXECUTION_TIMEOUT=60m
-
-# shellcheck disable=SC2034  # used elsewhere
-# Increase greenboot timeout for optional packages (more services to start)
-GREENBOOT_TIMEOUT=1200
-
 # Redefine network-related settings to use the dedicated network bridge
 VM_BRIDGE_IP="$(get_vm_bridge_ip "${VM_MULTUS_NETWORK}")"
 # shellcheck disable=SC2034  # used elsewhere