diff --git a/packages/cli/bin/debug_surveys.dart b/packages/cli/bin/debug_surveys.dart
index cfd06009..097caa50 100644
--- a/packages/cli/bin/debug_surveys.dart
+++ b/packages/cli/bin/debug_surveys.dart
@@ -25,6 +25,8 @@ Future<void> command(FileSystem fs, ArgResults argResults) async {
     nearbyMarketSymbol: mineSymbol,
   );
   logger.info('$survey');
+  // Required or main will hang.
+  await db.close();
 }
 
 void main(List<String> args) async {
diff --git a/packages/cli/bin/earning_rate.dart b/packages/cli/bin/earning_rate.dart
index f30de1dd..10afa320 100644
--- a/packages/cli/bin/earning_rate.dart
+++ b/packages/cli/bin/earning_rate.dart
@@ -51,7 +51,8 @@ Future<void> command(FileSystem fs, ArgResults argResults) async {
     final credits = creditsString(last.agentCredits).padLeft(creditsWidth);
     logger.info('-$sinceLast $credits');
   }
-  // Print per-ship data.
+  // Required or main will hang.
+  await db.close();
 }
 
 void main(List<String> args) async {
diff --git a/packages/cli/bin/list_repeated_transactions.dart b/packages/cli/bin/list_repeated_transactions.dart
index 066cd5d7..c91233c4 100644
--- a/packages/cli/bin/list_repeated_transactions.dart
+++ b/packages/cli/bin/list_repeated_transactions.dart
@@ -112,6 +112,8 @@ Future<void> command(FileSystem fs, ArgResults argResults) async {
     // final p = PolyFit(x, y, degree);
     // print(p);
   }
+  // Required or main will hang.
+  await db.close();
 }
 
 void main(List<String> args) async {
diff --git a/packages/cli/bin/recent_deals.dart b/packages/cli/bin/recent_deals.dart
index c395d4d8..d79aa6bc 100644
--- a/packages/cli/bin/recent_deals.dart
+++ b/packages/cli/bin/recent_deals.dart
@@ -181,5 +181,6 @@ Future<void> command(FileSystem fs, ArgResults argResults) async {
     logger.info(describeTransaction(transaction));
   }
 
+  // Required or main will hang.
   await db.close();
 }
diff --git a/packages/cli/bin/route_perf.dart b/packages/cli/bin/route_perf.dart
index db2146e8..be03213d 100644
--- a/packages/cli/bin/route_perf.dart
+++ b/packages/cli/bin/route_perf.dart
@@ -79,4 +79,7 @@ Future<void> command(FileSystem fs, ArgResults argResults) async {
       'took ${result.duration.inMilliseconds}ms',
     );
   }
+
+  // Required or main will hang.
+  await db.close();
 }
diff --git a/packages/cli/bin/systems_reachable_from_factions.dart b/packages/cli/bin/systems_reachable_from_factions.dart
index fd21df79..0bc88bde 100644
--- a/packages/cli/bin/systems_reachable_from_factions.dart
+++ b/packages/cli/bin/systems_reachable_from_factions.dart
@@ -15,6 +15,7 @@ Future<void> command(FileSystem fs, ArgResults argResults) async {
     final reachable = clusterCache.connectedSystemCount(hq.systemSymbol);
     logger.info('${faction.symbol}: $reachable');
   }
+  // Required or main will hang.
   await db.close();
 }