diff --git a/tools/validate-trixie-release.sh b/tools/validate-trixie-release.sh
index 6bb1a47..4f3998d 100755
--- a/tools/validate-trixie-release.sh
+++ b/tools/validate-trixie-release.sh
@@ -29,7 +29,17 @@ if [[ -n "$previous" ]]; then
     docker_args+=( -v "$previous:/packages/previous.deb:ro" )
 fi
 
-timeout --signal=TERM --kill-after=15s 720s \
+# 720s was enough while this package's heaviest dependency was Plasma.
+# 0.2.6 adds LibreOffice and a dozen font packages for Presentations, and
+# the run installs the PREVIOUS package as well as the candidate, so the
+# container now does two full desktop installs. Measured: the previous
+# install alone ran past 360s on the development VM and the whole run was
+# killed before it reached a single assertion.
+#
+# Generous rather than tight, on purpose. This is the gate that has to
+# say "the package is wrong", and a gate that says "the machine was busy"
+# instead teaches everybody to re-run it until it passes.
+timeout --signal=TERM --kill-after=15s 2700s \
     docker "${docker_args[@]}" debian:trixie-slim \
     bash -s -- "${previous:+/packages/previous.deb}" <<'CONTAINER'
 set -Eeuo pipefail
@@ -74,12 +84,12 @@ run_logged() {
     fi
 }
 
-run_logged apt-update 120 apt-get update -qq
+run_logged apt-update 300 apt-get update -qq
 
 previous="${1:-}"
 
 if [[ -n "$previous" ]]; then
-    run_logged previous-install 360 apt-get install -y -qq "$previous"
+    run_logged previous-install 1200 apt-get install -y -qq "$previous"
 
     cat > /etc/ekklesia-classroom/device.conf <<'CONFIG'
 # Configuration carried forward from 0.1.36
@@ -96,7 +106,7 @@ CUSTOM_SETTING=preserve-me-too
 CONFIG
 fi
 
-run_logged candidate-install 360 apt-get install -y -qq /packages/candidate.deb
+run_logged candidate-install 1200 apt-get install -y -qq /packages/candidate.deb
 
 command -v nmtui >/dev/null
 command -v lpadmin >/dev/null
@@ -387,7 +397,7 @@ if [[ -n "$previous" ]]; then
         [[ "$(grep -c "^${setting}=" /etc/ekklesia-classroom/device.conf)" -eq 1 ]]
     done
 
-    run_logged candidate-reinstall 360 \
+    run_logged candidate-reinstall 900 \
         apt-get install --reinstall -y -qq /packages/candidate.deb
 
     # An install that changes nothing must change nothing.