diff --git a/Justfile b/Justfile
index 64db2b8..1c3eb21 100644
--- a/Justfile
+++ b/Justfile
@@ -10,5 +10,9 @@ stop:
 admin:
     docker compose exec -T app cat /data/admin-password
 
+test:
+    if ! cargo nextest --version >/dev/null 2>&1; then cargo install cargo-nextest --locked; fi
+    cargo nextest run --workspace
+
 dev:
     SHARD_DATABASE_URL="sqlite://sim-shard-{shard}.db?mode=rwc" cargo run
\ No newline at end of file
diff --git a/src/world.rs b/src/world.rs
index 1fec924..de0bef8 100644
--- a/src/world.rs
+++ b/src/world.rs
@@ -3736,7 +3736,7 @@ mod tests {
     }
 
     /// The default script at the size of the original single village, for long-running tests.
-    fn village_script() -> SimScript {
+    fn village_script_source() -> String {
         let source = [
             ("WIDTH", "96"),
             ("HEIGHT", "64"),
@@ -3757,6 +3757,11 @@ mod tests {
         .fold(DEFAULT_SCRIPT.to_string(), |source, (name, value)| {
             with_constant(&source, name, value)
         });
+        source
+    }
+
+    fn village_script() -> SimScript {
+        let source = village_script_source();
         SimScript::load(&source).unwrap()
     }
 
@@ -4326,7 +4331,9 @@ mod tests {
 
     #[test]
     fn village_survives_until_its_first_weekly_birth_check() {
-        let mut world = World::new_with_script(42, village_script());
+        let script = with_constant(&village_script_source(), "TICKS_PER_DAY", "240");
+        let script = SimScript::load(&script).unwrap();
+        let mut world = World::new_with_script(42, script);
         let first_week_tick =
             world.calendar.ticks_per_day * u64::from(world.calendar.days_per_week);
         let mut daily = Vec::new();