diff --git a/src/runtime/run_xev_bridge.zig b/src/runtime/run_xev_bridge.zig
index 22e890c..1c1c79e 100644
--- a/src/runtime/run_xev_bridge.zig
+++ b/src/runtime/run_xev_bridge.zig
@@ -272,11 +272,13 @@ fn readPollCallback(
             const wg = s.write_g;
             s.read_g = null;
             s.write_g = null;
+            if (rg != null or wg != null) callbacks_fired += 1;
             cb(fd, 3, rg, wg);
             return .disarm;
         };
         const rg = s.read_g;
         s.read_g = null;
+        if (rg != null) callbacks_fired += 1;
         cb(fd, 1, rg, null);
     }
     return .disarm;
@@ -348,6 +350,9 @@ export fn run_xev_tick() c_int {
     if (!loop_initialized) return 0;
     if (registered_count <= 0) return 0;
 
+    // Drain all currently-ready completions in this tick. On kqueue, a single
+    // no_wait run can report only one completion even when multiple fds are
+    // already ready; bounded draining ensures fairness and avoids dropped wakeups.
     callbacks_fired = 0;
     var previous_callbacks: u32 = 0;
     var i: u8 = 0;
diff --git a/src/runtime/tests/test_poller.c b/src/runtime/tests/test_poller.c
index 7fd2144..fccc85e 100644
--- a/src/runtime/tests/test_poller.c
+++ b/src/runtime/tests/test_poller.c
@@ -398,23 +398,10 @@ void run_test_poller(void) {
     TEST_SUITE("run_poller");
     RUN_TEST(test_poller_has_waiters);
     RUN_TEST(test_poller_open_close);
-#ifdef _WIN32
-    RUN_TEST(test_poller_pipe_read);
     RUN_TEST(test_poller_close_while_waiting);
-#else
-    /* Gated on #426: hangs on Linux x86_64 CI due to libxev epoll state leaking
-     * across tests (passes in isolation and on macOS). Re-enable once #426 is fixed. */
-    /* RUN_TEST(test_poller_close_while_waiting); */
-    /* Gated on #426: hangs on macOS CI due to libxev kqueue state leaking from
-     * prior tests (passes in isolation). Re-enable once #426 is fixed. */
-    /* RUN_TEST(test_poller_pipe_read); */
-    /* Gated on #426: passes in isolation, but running it in the same suite as
-     * test_poller_pipe_read in either order causes the second test to hang due
-     * to inter-test libxev state leak. Re-enable once #426 is fixed. */
-    /* RUN_TEST(test_poller_write_park); */
-    /* Gated on #424: libxev kqueue adapter only fires one fd's callback per
-     * tick when multiple fds are ready, so this test hangs. Re-enable once
-     * the adapter is fixed. */
-    /* RUN_TEST(test_poller_multiple_fds); */
+    RUN_TEST(test_poller_pipe_read);
+#ifndef _WIN32
+    RUN_TEST(test_poller_write_park);
 #endif
+    RUN_TEST(test_poller_multiple_fds);
 }