diff --git a/backend/tests/Unit/Schedule/EvenDistributionSchedulerTest.php b/backend/tests/Unit/Schedule/EvenDistributionSchedulerTest.php
index 2c0bf0d..6f34eca 100644
--- a/backend/tests/Unit/Schedule/EvenDistributionSchedulerTest.php
+++ b/backend/tests/Unit/Schedule/EvenDistributionSchedulerTest.php
@@ -19,7 +19,8 @@ class EvenDistributionSchedulerTest extends TestCase
             WorkloadPlacement::End->value => [2, 2, 2, 2, 3],
         ];
 
-        foreach (WorkloadPlacement::cases() as $placement) {
+        foreach ($expectedCounts as $placementValue => $expectedDailyCounts) {
+            $placement = WorkloadPlacement::from($placementValue);
             $dates = $scheduler->scheduledDates(
                 assignmentCount: 11,
                 startDate: $this->utc('2026-08-10'),
@@ -28,7 +29,7 @@ class EvenDistributionSchedulerTest extends TestCase
             );
 
             $this->assertSame(
-                $expectedCounts[$placement->value],
+                $expectedDailyCounts,
                 $this->dailyCounts($dates),
             );
         }
@@ -43,7 +44,8 @@ class EvenDistributionSchedulerTest extends TestCase
             WorkloadPlacement::End->value => [2, 2, 2, 3, 3],
         ];
 
-        foreach (WorkloadPlacement::cases() as $placement) {
+        foreach ($expectedCounts as $placementValue => $expectedDailyCounts) {
+            $placement = WorkloadPlacement::from($placementValue);
             $dates = $scheduler->scheduledDates(
                 assignmentCount: 12,
                 startDate: $this->utc('2026-08-10'),
@@ -52,7 +54,7 @@ class EvenDistributionSchedulerTest extends TestCase
             );
 
             $this->assertSame(
-                $expectedCounts[$placement->value],
+                $expectedDailyCounts,
                 $this->dailyCounts($dates),
             );
         }