diff --git a/tests/e2e/test_decline_reopen.py b/tests/e2e/test_decline_reopen.py
new file mode 100644
index 00000000..ac33ae65
--- /dev/null
+++ b/tests/e2e/test_decline_reopen.py
@@ -0,0 +1,78 @@
+"""Overnight B8 e2e — declining a shift re-opens it for another volunteer.
+
+Alice self-claims an open shift, then declines it. The slot must
+re-appear in /v/open so Bob can claim it.
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from tests.e2e._helpers import accept_invitation, invite_token, no_js_errors, rid, signup_admin
+
+pytestmark = pytest.mark.e2e
+
+
+def _invite(page, base, name, email):
+    page.goto(f"{base}/a/people")
+    page.click("button:has-text('Invite person')")
+    page.fill("#inv_name", name)
+    page.fill("#inv_email", email)
+    page.select_option("#inv_role", "volunteer")
+    page.click("button:has-text('Send invite')")
+    page.wait_for_selector("#invite-result:has-text('Invitation sent')")
+
+
+def test_decline_reopens_slot(live_server, new_context, page, db_path):
+    base = live_server
+    a_email = f"alice+{rid()}@hope.e2e"
+    b_email = f"bob+{rid()}@hope.e2e"
+
+    signup_admin(page, base)
+
+    _invite(page, base, "Alice Vol", a_email)
+    a_page = accept_invitation(new_context(), base, invite_token(db_path, a_email))
+    _invite(page, base, "Bob Vol", b_email)
+    b_page = accept_invitation(new_context(), base, invite_token(db_path, b_email))
+
+    page.goto(f"{base}/a/events")
+    page.click("button:has-text('New event')")
+    page.wait_for_selector("#ev_type", state="visible")
+    page.fill("#ev_type", "Sunday 10am Service")
+    page.fill("#ev_date", "2026-06-07")
+    page.fill("#ev_start", "10:00")
+    page.fill("#ev_end", "11:30")
+    page.fill("input[name=role_name]", "volunteer")
+    page.fill("input[name=role_count]", "1")
+    page.click("button:has-text('Create event')")
+    page.wait_for_selector("#events-list:has-text('Sunday 10am Service')")
+
+    # Alice claims the only open slot.
+    a_page.goto(f"{base}/v/open")
+    a_page.wait_for_selector("#open-list:has-text('Sunday 10am Service')")
+    a_page.click("button:has-text('Claim')")
+    a_page.wait_for_selector("#open-list:has-text('No open shifts')")
+
+    # With the slot filled, Bob does not see it.
+    b_page.goto(f"{base}/v/open")
+    b_page.wait_for_selector("#open-list:has-text('No open shifts')")
+
+    # Alice declines the shift.
+    a_page.goto(f"{base}/v/schedule")
+    a_page.click("a:has-text('Sunday 10am Service')")
+    a_page.wait_for_selector("#assignment-card")
+    a_page.click("button:text-is('Decline')")
+    a_page.fill("#decline_reason", "Schedule conflict")
+    a_page.click("button:text-is('Confirm decline')")
+    a_page.wait_for_selector("#assignment-card .status-text.declined")
+
+    # The slot re-opens — Bob can now see and claim it.
+    b_page.goto(f"{base}/v/open")
+    b_page.wait_for_selector("#open-list:has-text('Sunday 10am Service')")
+    b_page.click("button:has-text('Claim')")
+    b_page.wait_for_selector("#open-list:has-text('No open shifts')")
+
+    b_page.goto(f"{base}/v/schedule")
+    b_page.wait_for_selector("text=Sunday 10am Service")
+
+    no_js_errors(b_page)
diff --git a/tests/web/test_decline_reopen.py b/tests/web/test_decline_reopen.py
new file mode 100644
index 00000000..081bc26b
--- /dev/null
+++ b/tests/web/test_decline_reopen.py
@@ -0,0 +1,89 @@
+"""Overnight B8 — a declined assignment re-opens its slot."""
+
+from __future__ import annotations
+
+from datetime import datetime, timedelta
+
+from api.models import Assignment, Event
+from tests.web.conftest import seed_person
+from web.deps import SESSION_COOKIE
+
+
+def _vol(client, db, *, org, pid, email):
+    seed_person(db, person_id=pid, org_id=org, email=email, roles=["volunteer"])
+    r = client.post("/auth/login", data={"email": email, "password": "WebPass123!"})
+    return r.cookies[SESSION_COOKIE]
+
+
+def _event(db, org, *, eid="dr_ev"):
+    start = datetime.utcnow() + timedelta(days=7)
+    db.add(
+        Event(
+            id=eid,
+            org_id=org,
+            type="Sunday Service",
+            start_time=start,
+            end_time=start + timedelta(hours=1),
+            extra_data={"role_counts": {"volunteer": 1}},
+        )
+    )
+    db.commit()
+
+
+def _assign(db, *, eid, pid, status):
+    db.add(
+        Assignment(
+            event_id=eid,
+            person_id=pid,
+            role="volunteer",
+            status=status,
+            solution_id=None,
+        )
+    )
+    db.commit()
+
+
+def test_confirmed_assignment_hides_open_slot(client, db):
+    seed_person(db, person_id="dr_a", org_id="dr_o1", email="a@dr.test", roles=["volunteer"])
+    tok_b = _vol(client, db, org="dr_o1", pid="dr_b", email="b@dr.test")
+    _event(db, "dr_o1")
+    _assign(db, eid="dr_ev", pid="dr_a", status="confirmed")
+    r = client.get("/v/open", cookies={SESSION_COOKIE: tok_b})
+    assert "No open shifts right now" in r.text
+    assert "Sunday Service" not in r.text
+
+
+def test_declined_assignment_reopens_and_is_claimable(client, db):
+    seed_person(db, person_id="dr_a2", org_id="dr_o2", email="a2@dr.test", roles=["volunteer"])
+    tok_b = _vol(client, db, org="dr_o2", pid="dr_b2", email="b2@dr.test")
+    _event(db, "dr_o2")
+    _assign(db, eid="dr_ev", pid="dr_a2", status="declined")
+
+    r = client.get("/v/open", cookies={SESSION_COOKIE: tok_b})
+    assert "Sunday Service" in r.text and "1 of 1 open" in r.text
+
+    c = client.post(
+        "/v/open/dr_ev/claim", data={"role": "volunteer"}, cookies={SESSION_COOKIE: tok_b}
+    )
+    assert c.status_code == 200
+    got = (
+        db.query(Assignment)
+        .filter(
+            Assignment.event_id == "dr_ev",
+            Assignment.person_id == "dr_b2",
+            Assignment.role == "volunteer",
+        )
+        .first()
+    )
+    assert got is not None and got.status == "confirmed"
+
+
+def test_declined_does_not_consume_claim_capacity(client, db):
+    seed_person(db, person_id="dr_a3", org_id="dr_o3", email="a3@dr.test", roles=["volunteer"])
+    tok_b = _vol(client, db, org="dr_o3", pid="dr_b3", email="b3@dr.test")
+    _event(db, "dr_o3")
+    _assign(db, eid="dr_ev", pid="dr_a3", status="declined")
+    c = client.post(
+        "/v/open/dr_ev/claim", data={"role": "volunteer"}, cookies={SESSION_COOKIE: tok_b}
+    )
+    assert c.status_code == 200
diff --git a/web/routers/pages.py b/web/routers/pages.py
index f7113394..fa8ee347 100644
--- a/web/routers/pages.py
+++ b/web/routers/pages.py
@@ -157,6 +157,10 @@ def _open_shifts(db: Session, person: Person) -> list[dict]:
             continue  # already on this event — don't offer it
         filled: dict[str, int] = {}
         for a in rows:
+            # A declined assignment frees its slot — it must not count
+            # as filled, so the role re-opens for self-serve (B8).
+            if (a.status or "").lower() == "declined":
+                continue
             filled[a.role or ""] = filled.get(a.role or "", 0) + 1
         roles = [
             {"role": r, "needed": n, "remaining": n - filled.get(r, 0)}
diff --git a/web/routers/partials.py b/web/routers/partials.py
index 8636e7d1..fa50d368 100644
--- a/web/routers/partials.py
+++ b/web/routers/partials.py
@@ -230,7 +230,14 @@ def open_claim(
     )
     if any(a.person_id == person.id for a in rows):
         return _open_list(request, person, db, error="You're already on this event.")
-    if sum(1 for a in rows if (a.role or "") == role) >= rc[role]:
+    if (
+        sum(
+            1
+            for a in rows
+            if (a.role or "") == role and (a.status or "").lower() != "declined"
+        )
+        >= rc[role]
+    ):
         return _open_list(request, person, db, error="That role just filled up.")
 
     db.add(