diff --git a/tsdb/engine/tsm1/compact_test.go b/tsdb/engine/tsm1/compact_test.go
index e73edfb418..40bc8cbdf5 100644
--- a/tsdb/engine/tsm1/compact_test.go
+++ b/tsdb/engine/tsm1/compact_test.go
@@ -2645,6 +2645,12 @@ func TestDefaultPlanner_PlanOptimize_Test(t *testing.T) {
 
 			// Reverse test files and re-run tests
 			slices.Reverse(test.fs)
+			if len(test.bc) > 0 {
+				slices.Reverse(test.bc)
+				err := ffs.SetBlockCounts(test.bc)
+				require.NoError(t, err, "setting reverse block counts")
+			}
+
 			cp = tsm1.NewDefaultPlanner(ffs, tsdb.DefaultCompactFullWriteColdDuration)
 			expectedNotFullyCompacted(cp, test.expectedFullyCompactedReasonExp, test.expectedgenerationCount)
 		})
@@ -2771,6 +2777,12 @@ func TestDefaultPlanner_PlanOptimize_Test(t *testing.T) {
 
 			// Reverse test files and re-run tests
 			slices.Reverse(test.fs)
+			if len(test.bc) > 0 {
+				slices.Reverse(test.bc)
+				err := ffs.SetBlockCounts(test.bc)
+				require.NoError(t, err, "setting reverse block counts")
+			}
+
 			cp = tsm1.NewDefaultPlanner(ffs, tsdb.DefaultCompactFullWriteColdDuration)
 			expectedFullyCompacted(cp, test.expectedFullyCompactedReasonExp)
 		})