diff --git a/pyproject.toml b/pyproject.toml
index d30ad23..edcb5c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,4 +34,4 @@ requires-python = ">=3.9"
 
 [tool.pytest.ini_options]
 addopts = "--doctest-modules --import-mode importlib"
-norecursedirs = "builddir docs example"
+testpaths = "src tests"
diff --git a/src/cysignals/implementation.c b/src/cysignals/implementation.c
index 20a83d0..18b8144 100644
--- a/src/cysignals/implementation.c
+++ b/src/cysignals/implementation.c
@@ -591,7 +591,7 @@ static void _sig_on_interrupt_received(void)
     do_raise_exception(cysigs.interrupt_received);
     cysigs.sig_on_count = 0;
     cysigs.interrupt_received = 0;
-    custom_signal_unblock();
+    custom_set_pending_signal(0);
 
 #if HAVE_SIGPROCMASK
     sigprocmask(SIG_SETMASK, &oldset, NULL);
diff --git a/tests/test_custom_signals.py b/tests/test_custom_signals.py
new file mode 100644
index 0000000..0afc36f
--- /dev/null
+++ b/tests/test_custom_signals.py
@@ -0,0 +1,23 @@
+"""
+Tests for custom signals.
+"""
+
+import time
+import pytest
+
+def test_clear_pending():
+    """
+    Regression test for https://github.com/sagemath/cysignals/pull/216
+    """
+
+    alarm = pytest.importorskip("cysignals.alarm")  # n/a on windows
+    cypari2 = pytest.importorskip("cypari2")
+
+    with pytest.raises(alarm.AlarmInterrupt):
+        alarm.alarm(0.01)
+        time.sleep(1)
+
+    try:
+        cypari2.Pari()
+    except alarm.AlarmInterrupt:
+        pytest.fail("AlarmInterrupt was not cleared")