diff --git a/test/shell/prometheus-1.sh b/test/shell/prometheus-1.sh
index 5421a679..8a54fa1f 100755
--- a/test/shell/prometheus-1.sh
+++ b/test/shell/prometheus-1.sh
@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 # run empty graph, with prometheus support
-$timeout --kill-after=20s 15s ./mgmt run --tmp-prefix --prometheus &
+$timeout --kill-after=40s 35s ./mgmt run --tmp-prefix --prometheus &
 pid=$!
 sleep 5s	# let it converge
 
diff --git a/test/shell/prometheus-2.sh b/test/shell/prometheus-2.sh
index 733fe647..99cce9ec 100755
--- a/test/shell/prometheus-2.sh
+++ b/test/shell/prometheus-2.sh
@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 # run empty graph, with prometheus support
-$timeout --kill-after=20s 15s ./mgmt run --tmp-prefix --prometheus --prometheus-listen :52637 &
+$timeout --kill-after=40s 35s ./mgmt run --tmp-prefix --prometheus --prometheus-listen :52637 &
 pid=$!
 sleep 5s	# let it converge
 
diff --git a/test/shell/prometheus-3.sh b/test/shell/prometheus-3.sh
index 8be528d7..eee8b085 100755
--- a/test/shell/prometheus-3.sh
+++ b/test/shell/prometheus-3.sh
@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 # run a graph, with prometheus support
-timeout --kill-after=30s 25s ./mgmt run --tmp-prefix --no-pgp --prometheus --yaml prometheus-3.yaml &
+timeout --kill-after=40s 35s ./mgmt run --tmp-prefix --no-pgp --prometheus --yaml prometheus-3.yaml &
 pid=$!
 sleep 10s	# let it converge