diff --git a/internal/service/week_service_test.go b/internal/service/week_service_test.go
index bed8d7a..b7e8e23 100644
--- a/internal/service/week_service_test.go
+++ b/internal/service/week_service_test.go
@@ -12,7 +12,7 @@ import (
 	"github.com/wotra/wotra/internal/store"
 )
 
-// weekTestAnchor is a fixed Tuesday (2026-W20) used as "now" across week service tests.
+// weekTestAnchor is a fixed Wednesday (2026-W20) used as "now" across week service tests.
 var weekTestAnchor = time.Date(2026, 5, 13, 10, 0, 0, 0, time.UTC)
 
 func newFullServices(t *testing.T) (*service.EntryService, *service.DayService, *service.WeekService, *service.SettingsService, *clock.FixedClock) {
@@ -166,31 +166,88 @@ func TestReopenWeek(t *testing.T) {
 }
 
 func TestCloseWeekMidWeek(t *testing.T) {
-	// weekTestAnchor = 2026-05-13 (Tuesday, 2026-W20).
-	// Mon 2026-05-11 and Tue 2026-05-13 are past workdays; Wed-Fri are future.
+	// weekTestAnchor = 2026-05-13 (Wednesday, 2026-W20).
+	// Mon–Wed are tracked with real intervals and closed. Thu is pre-marked as
+	// holiday, Fri as vacation. CloseWeek is called mid-week: the service skips
+	// future workdays (Thu, Fri), so only Mon+Tue+Wed intervals count.
 	ctx := context.Background()
-	_, daySvc, weekSvc, _, clk := newFullServices(t)
+	entrySvc, daySvc, weekSvc, _, _ := newFullServices(t)
 
-	tz, _ := time.LoadLocation("UTC")
-	now := clk.Now().In(tz)
-	isoYear, isoWeek := now.ISOWeek()
-	weekKey := fmt.Sprintf("%d-W%02d", isoYear, isoWeek)
+	const weekKey = "2026-W20"
+	mon := time.Date(2026, 5, 11, 0, 0, 0, 0, time.UTC)
+	tue := time.Date(2026, 5, 12, 0, 0, 0, 0, time.UTC)
+	wed := time.Date(2026, 5, 13, 0, 0, 0, 0, time.UTC)
+	thu := time.Date(2026, 5, 14, 0, 0, 0, 0, time.UTC)
+	fri := time.Date(2026, 5, 15, 0, 0, 0, 0, time.UTC)
 
-	monday := now.AddDate(0, 0, -int(now.Weekday()-time.Monday))
-	today := now.Format("2006-01-02")
-	for d := monday; d.Format("2006-01-02") <= today; d = d.AddDate(0, 0, 1) {
-		wd := d.Weekday()
-		if wd == time.Saturday || wd == time.Sunday {
-			continue
-		}
-		dk := d.Format("2006-01-02")
-		if _, err := daySvc.MarkDay(ctx, dk, domain.DayKindHoliday); err != nil {
-			t.Fatalf("MarkDay %s: %v", dk, err)
-		}
+	// at returns the unix-ms for a given day at hh:mm UTC.
+	at := func(base time.Time, h, m int) int64 {
+		return time.Date(base.Year(), base.Month(), base.Day(), h, m, 0, 0, time.UTC).UnixMilli()
 	}
 
-	if _, err := weekSvc.CloseWeek(ctx, weekKey); err != nil {
-		t.Fatalf("CloseWeek mid-week: %v", err)
+	// Monday: 3 spans — 1.5h + 1h + 2h = 4.5h
+	for _, s := range [][2][2]int{{{9, 0}, {10, 30}}, {{11, 0}, {12, 0}}, {{13, 0}, {15, 0}}} {
+		if _, err := entrySvc.CreateInterval(ctx, service.CreateIntervalInput{
+			StartTime: at(mon, s[0][0], s[0][1]),
+			EndTime:   at(mon, s[1][0], s[1][1]),
+		}); err != nil {
+			t.Fatalf("CreateInterval mon: %v", err)
+		}
+	}
+	if _, err := daySvc.CloseDay(ctx, mon.Format("2006-01-02")); err != nil {
+		t.Fatalf("CloseDay mon: %v", err)
+	}
+
+	// Tuesday: 1 span — 4h
+	if _, err := entrySvc.CreateInterval(ctx, service.CreateIntervalInput{
+		StartTime: at(tue, 9, 0),
+		EndTime:   at(tue, 13, 0),
+	}); err != nil {
+		t.Fatalf("CreateInterval tue: %v", err)
+	}
+	if _, err := daySvc.CloseDay(ctx, tue.Format("2006-01-02")); err != nil {
+		t.Fatalf("CloseDay tue: %v", err)
+	}
+
+	// Wednesday: 2 spans — 2h + 2h = 4h
+	for _, s := range [][2][2]int{{{9, 0}, {11, 0}}, {{14, 0}, {16, 0}}} {
+		if _, err := entrySvc.CreateInterval(ctx, service.CreateIntervalInput{
+			StartTime: at(wed, s[0][0], s[0][1]),
+			EndTime:   at(wed, s[1][0], s[1][1]),
+		}); err != nil {
+			t.Fatalf("CreateInterval wed: %v", err)
+		}
+	}
+	if _, err := daySvc.CloseDay(ctx, wed.Format("2006-01-02")); err != nil {
+		t.Fatalf("CloseDay wed: %v", err)
+	}
+
+	// Thursday and Friday are future — mark them ahead of time, so we can
+	// finish early.
+	if _, err := daySvc.MarkDay(ctx, thu.Format("2006-01-02"), domain.DayKindHoliday); err != nil {
+		t.Fatalf("MarkDay thu: %v", err)
+	}
+	if _, err := daySvc.MarkDay(ctx, fri.Format("2006-01-02"), domain.DayKindVacation); err != nil {
+		t.Fatalf("MarkDay fri: %v", err)
+	}
+
+	cw, err := weekSvc.CloseWeek(ctx, weekKey)
+	if err != nil {
+		t.Fatalf("CloseWeek: %v", err)
+	}
+
+	// Only Mon+Tue+Wed contribute: 4.5h + 4h + 4h + 8h + 8h = 28.5h
+	const wantWorked = 28*time.Hour + 30*time.Minute
+	if cw.WorkedMs != int64(wantWorked/time.Millisecond) {
+		t.Errorf("worked hours: want %s, got %s", wantWorked, time.Duration(cw.WorkedMs)*time.Millisecond)
+	}
+	const wantExpected = 40*time.Hour
+	if cw.ExpectedMs != int64(wantExpected/time.Millisecond) {
+		t.Errorf("expected_ms: want %s, got %s", wantExpected, time.Duration(cw.ExpectedMs)*time.Millisecond)
+	}
+	const wantDelta = wantWorked - wantExpected // −11.5h
+	if cw.DeltaMs != int64(wantDelta) {
+		t.Errorf("delta_ms: want %s, got %s", wantDelta, time.Duration(cw.DeltaMs)*time.Millisecond)
 	}
 }