diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3cc1413..bfafaf2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -68,17 +68,14 @@ jobs:
           submodules: recursive
           fetch-depth: 0
     - name: Set up Cygwin
-      uses: egor-tensin/setup-cygwin@v4
+      uses: dimpase/setup-cygwin@v5
       with:
-        packages: gcc-core gcc-g++ python3${{ matrix.python-version }}-devel ninja pkgconf
-    - name: Install dependencies
+        packages: gcc-core gcc-g++ python3${{ matrix.python-version }}-devel ninja pkgconf meson
+    - name: Install dependencies, build and check
       shell: C:\tools\cygwin\bin\bash.exe --norc -eo pipefail -o igncr '{0}'
       run: |
         python3.${{ matrix.python-version }} -m pip install --upgrade pip
-        python3.${{ matrix.python-version }} -m pip install --upgrade -r ./requirements.txt
-    - name: Build and check
-      shell: C:\tools\cygwin\bin\bash.exe --norc -eo pipefail -o igncr '{0}'
-      run: |
+        pip install --upgrade -r ./requirements.txt
         pip install --no-build-isolation --config-settings=builddir=builddir .
         meson test --print-errorlogs -C builddir
 
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")