diff --git a/resource/traversers/dfu.cpp b/resource/traversers/dfu.cpp
index 4f7e7c735..061b6844b 100644
--- a/resource/traversers/dfu.cpp
+++ b/resource/traversers/dfu.cpp
@@ -290,7 +290,9 @@ int dfu_traverser_t::run (Jobspec::Jobspec &jobspec,
     }
 
     int rc = -1;
-    int64_t graph_end = graph_duration.graph_end.time_since_epoch ().count ();
+    int64_t graph_end = std::chrono::duration_cast<std::chrono::seconds>
+                            (graph_duration.graph_end
+                                .time_since_epoch ()).count ();
     detail::jobmeta_t meta;
     vtx_t root = get_graph_db ()->metadata.roots.at (dom);
     bool x = detail::dfu_impl_t::exclusivity (jobspec.resources, root);
diff --git a/t/t4011-match-duration.t b/t/t4011-match-duration.t
index 7ab888a75..44f59af4f 100755
--- a/t/t4011-match-duration.t
+++ b/t/t4011-match-duration.t
@@ -9,17 +9,58 @@ test_description='Test that parent duration is inherited according to RFC14'
 #
 test_under_flux 1
 
-test_expect_success HAVE_JQ 'parent duration is inherited when duration=0' '
+export FLUX_URI_RESOLVE_LOCAL=t
+
+# Ensure fluxion modules are loaded under flux-alloc(1)
+test_expect_success 'set FLUX_RC_EXTRA so Fluxion modules are loaded under flux-alloc' '
+	mkdir rc1.d &&
+	cat <<-EOF >rc1.d/rc1-fluxion &&
+	flux module unload -f sched-simple
+	flux module load sched-fluxion-resource
+	flux module load sched-fluxion-qmanager
+	EOF
+	mkdir rc3.d &&
+	cat <<-EOF >rc3.d/rc3-fluxion &&
+	flux module remove -f sched-fluxion-qmanager
+	flux module remove -f sched-fluxion-resource
+	flux module load sched-simple
+	EOF
+	chmod +x rc1.d/rc1-fluxion rc3.d/rc3-fluxion &&
+	export FLUX_RC_EXTRA=$(pwd)
+'
+test_expect_success 'load fluxion modules in parent instance' '
+	flux module remove sched-simple &&
+	load_resource &&
+	load_qmanager &&
+	test_debug "flux dmesg -H | grep version"
+'
+test_expect_success HAVE_JQ 'parent expiration is inherited when duration=0' '
 	cat >get_R.sh <<-EOT &&
 	#!/bin/sh
-
 	flux job info \$FLUX_JOB_ID R
 	EOT
 	chmod +x get_R.sh &&
-	out=$(flux run -t20s -n1 flux start flux run -n1 ./get_R.sh) &&
-	echo "$out" | jq -e ".execution.expiration - .execution.starttime <= 20" &&
-	out=$(flux run -t30s -n1 flux start flux run -n1 ./get_R.sh) &&
-	echo "$out" | jq -e ".execution.expiration - .execution.starttime <= 30"
+	jobid=$(flux alloc -n1 -t5m --bg) &&
+	test_debug "flux proxy $jobid flux dmesg -H | grep version" &&
+	expiration=$(flux job info $jobid R | jq .execution.expiration) &&
+        duration=$(flux job info $jobid R \
+		| jq ".execution | .expiration - .starttime") &&
+	test_debug "echo expiration of alloc job is $expiration duration=$duration" &&
+	R1=$(flux proxy $jobid flux run -n1 ./get_R.sh) &&
+	exp1=$(echo "$R1" | jq .execution.expiration) &&
+	d1=$(echo "$R1" | jq ".execution | .expiration - .starttime") &&
+	test_debug "echo expiration of job is $exp1 duration=$d1" &&
+	echo $exp1 | jq ". == $expiration" &&
+	sleep 1 &&
+	R2=$(flux proxy $jobid flux run -n1 ./get_R.sh) &&
+	exp2=$(echo "$R2" | jq .execution.expiration) &&
+	d2=$(echo "$R2" | jq ".execution | .expiration - .starttime") &&
+	test_debug "echo expiration of second job is $exp2 duration=$d2" &&
+	echo $exp2 | jq ". == $expiration" &&
+	flux shutdown --quiet $jobid
+'
+test_expect_success 'unload fluxion modules' '
+	remove_qmanager &&
+	remove_resource
 '
-
 test_done