diff --git a/tests/domain/project-time-settings.command.test.ts b/tests/domain/project-time-settings.command.test.ts
index f11ac1be..9a868dae 100644
--- a/tests/domain/project-time-settings.command.test.ts
+++ b/tests/domain/project-time-settings.command.test.ts
@@ -10,10 +10,13 @@ describe("createSetProjectTimeSettingsCommand", () => {
     const originalTime = cloneProjectTimeSettings(
       store.getState().projectDocument.time
     );
-    const nextTime = {
-      startTimeOfDayHours: 18.5,
-      dayLengthMinutes: 12
-    };
+    const nextTime = cloneProjectTimeSettings(originalTime);
+    nextTime.startDayNumber = 4;
+    nextTime.startTimeOfDayHours = 18.5;
+    nextTime.dayLengthMinutes = 12;
+    nextTime.sunriseTimeOfDayHours = 5.75;
+    nextTime.sunsetTimeOfDayHours = 20.25;
+    nextTime.night.lightIntensityFactor = 0.28;
 
     store.executeCommand(
       createSetProjectTimeSettingsCommand({
diff --git a/tests/domain/world-settings.test.ts b/tests/domain/world-settings.test.ts
index 56b5d0ac..cec64810 100644
--- a/tests/domain/world-settings.test.ts
+++ b/tests/domain/world-settings.test.ts
@@ -106,4 +106,13 @@ describe("world settings helpers", () => {
 
     expect(areWorldSettingsEqual(left, right)).toBe(false);
   });
+
+  it("treats the scene project-time lighting toggle as part of authored world equality", () => {
+    const left = createDefaultWorldSettings();
+    const right = cloneWorldSettings(left);
+
+    right.projectTimeLightingEnabled = false;
+
+    expect(areWorldSettingsEqual(left, right)).toBe(false);
+  });
 });
diff --git a/tests/serialization/project-document-json.test.ts b/tests/serialization/project-document-json.test.ts
index 52f3bbce..9ad7ec3e 100644
--- a/tests/serialization/project-document-json.test.ts
+++ b/tests/serialization/project-document-json.test.ts
@@ -108,9 +108,39 @@ describe("project document JSON", () => {
         normalStrength: 0.85
       }
     };
+    document.scenes["scene-cellar"].world.projectTimeLightingEnabled = false;
     document.time = {
+      startDayNumber: 3,
       startTimeOfDayHours: 18.5,
-      dayLengthMinutes: 16
+      dayLengthMinutes: 16,
+      sunriseTimeOfDayHours: 5.5,
+      sunsetTimeOfDayHours: 19.75,
+      dawnDurationHours: 1.25,
+      duskDurationHours: 1.75,
+      dawn: {
+        skyTopColorHex: "#6680bc",
+        skyBottomColorHex: "#f3b07a",
+        ambientColorHex: "#ffe0ba",
+        ambientIntensityFactor: 0.78,
+        lightColorHex: "#ffd29d",
+        lightIntensityFactor: 0.82
+      },
+      dusk: {
+        skyTopColorHex: "#313d70",
+        skyBottomColorHex: "#e27b5e",
+        ambientColorHex: "#f0bf9f",
+        ambientIntensityFactor: 0.58,
+        lightColorHex: "#ff9d79",
+        lightIntensityFactor: 0.61
+      },
+      night: {
+        skyTopColorHex: "#070f1c",
+        skyBottomColorHex: "#18253b",
+        ambientColorHex: "#1a2941",
+        ambientIntensityFactor: 0.22,
+        lightColorHex: "#95b0ff",
+        lightIntensityFactor: 0.19
+      }
     };
 
     const serializedDocument = serializeProjectDocument(document);