diff --git a/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDate.js b/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDate.js
index 68cea3fb9a..a9e2f4501e 100644
--- a/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDate.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDate.js
@@ -19,9 +19,19 @@ describe("correct behavior", () => {
         };
         const plainDate = Temporal.Now.plainDate(calendar);
         const plainDateWithOffset = Temporal.Now.plainDate(calendar, timeZone);
-        // Yes, this will fail if a day, month, or year change happens between the above two lines :^)
-        expect(plainDateWithOffset.year).toBe(plainDate.year);
-        expect(plainDateWithOffset.month).toBe(plainDate.month);
-        expect(plainDateWithOffset.day).toBe(plainDate.day + 1);
+        if (plainDate.dayOfYear === plainDate.daysInYear) {
+            expect(plainDateWithOffset.year).toBe(plainDate.year + 1);
+            expect(plainDateWithOffset.month).toBe(1);
+            expect(plainDateWithOffset.day).toBe(1);
+        } else {
+            expect(plainDateWithOffset.year).toBe(plainDate.year);
+            if (plainDate.day === plainDate.daysInMonth) {
+                expect(plainDateWithOffset.month).toBe(plainDate.month + 1);
+                expect(plainDateWithOffset.day).toBe(1);
+            } else {
+                expect(plainDateWithOffset.month).toBe(plainDate.month);
+                expect(plainDateWithOffset.day).toBe(plainDate.day + 1);
+            }
+        }
     });
 });
diff --git a/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDateISO.js b/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDateISO.js
index 1463866f2d..ad70aedf4d 100644
--- a/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDateISO.js
+++ b/Userland/Libraries/LibJS/Tests/builtins/Temporal/Now/Now.plainDateISO.js
@@ -17,9 +17,19 @@ describe("correct behavior", () => {
         };
         const plainDate = Temporal.Now.plainDateISO();
         const plainDateWithOffset = Temporal.Now.plainDateISO(timeZone);
-        // Yes, this will fail if a day, month, or year change happens between the above two lines :^)
-        expect(plainDateWithOffset.year).toBe(plainDate.year);
-        expect(plainDateWithOffset.month).toBe(plainDate.month);
-        expect(plainDateWithOffset.day).toBe(plainDate.day + 1);
+        if (plainDate.dayOfYear === plainDate.daysInYear) {
+            expect(plainDateWithOffset.year).toBe(plainDate.year + 1);
+            expect(plainDateWithOffset.month).toBe(1);
+            expect(plainDateWithOffset.day).toBe(1);
+        } else {
+            expect(plainDateWithOffset.year).toBe(plainDate.year);
+            if (plainDate.day === plainDate.daysInMonth) {
+                expect(plainDateWithOffset.month).toBe(plainDate.month + 1);
+                expect(plainDateWithOffset.day).toBe(1);
+            } else {
+                expect(plainDateWithOffset.month).toBe(plainDate.month);
+                expect(plainDateWithOffset.day).toBe(plainDate.day + 1);
+            }
+        }
     });
 });