diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index adeb82d10b..90b2b9d834 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -993,7 +993,6 @@ unit:gcc:almalinux8:amd64:
   needs:
     - job: gcc:almalinux8:amd64
       artifacts: true
-  allow_failure: true  # remove once GL#5448 is fixed
 
 # Jobs for regular GCC builds on Alma Linux 9 (amd64)
 
diff --git a/tests/isc/meson.build b/tests/isc/meson.build
index 55eb7e8129..0b4254c8cc 100644
--- a/tests/isc/meson.build
+++ b/tests/isc/meson.build
@@ -60,7 +60,9 @@ flaky_isc_test = [
     'proxystream',
 ]
 
-if config.has('HAVE_LIBNGHTTP2')
+is_el8 = run_command('grep', '-q', '-F', 'platform:el8', '/etc/os-release', check: false).returncode() == 0
+
+if config.has('HAVE_LIBNGHTTP2') and not is_el8
     isc_test += 'doh'
 endif