diff --git a/test/Api.Test/Billing/Controllers/ProviderBillingControllerTests.cs b/test/Api.Test/Billing/Controllers/ProviderBillingControllerTests.cs
index d46038ae90..644303c873 100644
--- a/test/Api.Test/Billing/Controllers/ProviderBillingControllerTests.cs
+++ b/test/Api.Test/Billing/Controllers/ProviderBillingControllerTests.cs
@@ -260,13 +260,15 @@ public class ProviderBillingControllerTests
 
         var stripeAdapter = sutProvider.GetDependency<IStripeAdapter>();
 
-        var (thisYear, thisMonth, _) = DateTime.UtcNow;
-        var daysInThisMonth = DateTime.DaysInMonth(thisYear, thisMonth);
+        var now = DateTime.UtcNow;
+        var oneMonthAgo = now.AddMonths(-1);
+
+        var daysInThisMonth = DateTime.DaysInMonth(now.Year, now.Month);
 
         var subscription = new Subscription
         {
             CollectionMethod = StripeConstants.CollectionMethod.ChargeAutomatically,
-            CurrentPeriodEnd = new DateTime(thisYear, thisMonth, daysInThisMonth),
+            CurrentPeriodEnd = new DateTime(now.Year, now.Month, daysInThisMonth),
             Customer = new Customer
             {
                 Address = new Address
@@ -290,15 +292,14 @@ public class ProviderBillingControllerTests
                 options.Expand.Contains("customer.tax_ids") &&
                 options.Expand.Contains("test_clock"))).Returns(subscription);
 
-        var lastMonth = thisMonth - 1;
-        var daysInLastMonth = DateTime.DaysInMonth(thisYear, lastMonth);
+        var daysInLastMonth = DateTime.DaysInMonth(oneMonthAgo.Year, oneMonthAgo.Month);
 
         var overdueInvoice = new Invoice
         {
             Id = "invoice_id",
             Status = "open",
-            Created = new DateTime(thisYear, lastMonth, 1),
-            PeriodEnd = new DateTime(thisYear, lastMonth, daysInLastMonth),
+            Created = new DateTime(oneMonthAgo.Year, oneMonthAgo.Month, 1),
+            PeriodEnd = new DateTime(oneMonthAgo.Year, oneMonthAgo.Month, daysInLastMonth),
             Attempted = true
         };