diff --git a/zebra-network/src/peer_cache_updater.rs b/zebra-network/src/peer_cache_updater.rs
index 64c160e8..c213b873 100644
--- a/zebra-network/src/peer_cache_updater.rs
+++ b/zebra-network/src/peer_cache_updater.rs
@@ -25,7 +25,7 @@ pub async fn peer_cache_updater(
     //
     // TODO: turn the initial sleep time into a parameter of this function,
     //       and allow it to be set in tests
-    sleep(DNS_LOOKUP_TIMEOUT * 2).await;
+    sleep(DNS_LOOKUP_TIMEOUT * 4).await;
 
     loop {
         // Ignore errors because updating the cache is optional.
diff --git a/zebrad/tests/common/launch.rs b/zebrad/tests/common/launch.rs
index 8b8738b4..0ed4899b 100644
--- a/zebrad/tests/common/launch.rs
+++ b/zebrad/tests/common/launch.rs
@@ -39,7 +39,7 @@ pub const LAUNCH_DELAY: Duration = Duration::from_secs(15);
 
 /// After we launch `zebrad`, wait this long in extended tests.
 /// See [`LAUNCH_DELAY`] for details.
-pub const EXTENDED_LAUNCH_DELAY: Duration = Duration::from_secs(25);
+pub const EXTENDED_LAUNCH_DELAY: Duration = Duration::from_secs(45);
 
 /// After we launch `lightwalletd`, wait this long for the command to start up,
 /// take the actions expected by the quick tests, and log the expected logs.