diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 5a56c92..4e04c50 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -22,12 +22,12 @@ jobs:
       with:
         python-version: '3.10'
 
-    - name: Install Xvfb and dependencies
+    - name: Install system dependencies
       run: |
         sudo apt-get update
         sudo apt-get install -y xvfb libegl1-mesa
 
-    - name: Install dependencies
+    - name: Install Python dependencies
       run: |
         python -m pip install --upgrade pip
         pip install poetry
@@ -35,7 +35,4 @@ jobs:
 
     - name: Run tests
       run: |
-        Xvfb :99 -screen 0 1920x1080x24 &
-        sleep 3  # Give Xvfb a moment to start
-        export DISPLAY=:99
-        poetry run pytest -vvv --log-cli-level=DEBUG  --maxfail=1
\ No newline at end of file
+        poetry run pytest -vvv --log-cli-level=DEBUG --setup-show --maxfail=1
diff --git a/bitcoin_safe/signature_manager.py b/bitcoin_safe/signature_manager.py
index c8cfd1b..54a900a 100644
--- a/bitcoin_safe/signature_manager.py
+++ b/bitcoin_safe/signature_manager.py
@@ -117,6 +117,7 @@ def __init__(
     ) -> None:
         self.list_of_known_keys = list_of_known_keys if list_of_known_keys else []
         self._gpg = None
+        self.import_known_keys()
 
     @staticmethod
     def _get_gpg_path() -> Optional[str]:
@@ -171,7 +172,6 @@ def gpg(self):
             raise EnvironmentError("GnuPG is not installed on this system.")
 
     def import_known_keys(self) -> None:
-        self.gpg()
         for key in self.list_of_known_keys:
             self.gpg.import_keys(key.key)
 
diff --git a/poetry.lock b/poetry.lock
index d1ee155..9191b14 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1907,6 +1907,21 @@ pytest = "*"
 dev = ["pre-commit", "tox"]
 doc = ["sphinx", "sphinx-rtd-theme"]
 
+[[package]]
+name = "pytest-xvfb"
+version = "3.0.0"
+description = "A pytest plugin to run Xvfb (or Xephyr/Xvnc) for tests."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pytest-xvfb-3.0.0.tar.gz", hash = "sha256:3746ab1f4d1159f03f751638d053689ccd284291b38b8fb03d3ebbe7bf69cfc0"},
+    {file = "pytest_xvfb-3.0.0-py3-none-any.whl", hash = "sha256:352f247c788457ccdfcfeec8a47a2a6594c8eaf22f0302dae9e2635bb23975c2"},
+]
+
+[package.dependencies]
+pytest = ">=2.8.1"
+pyvirtualdisplay = ">=1.3"
+
 [[package]]
 name = "python-bitcointx"
 version = "1.1.4"
@@ -1959,6 +1974,17 @@ text-unidecode = ">=1.3"
 [package.extras]
 unidecode = ["Unidecode (>=1.1.1)"]
 
+[[package]]
+name = "pyvirtualdisplay"
+version = "3.0"
+description = "python wrapper for Xvfb, Xephyr and Xvnc"
+optional = false
+python-versions = "*"
+files = [
+    {file = "PyVirtualDisplay-3.0-py3-none-any.whl", hash = "sha256:40d4b8dfe4b8de8552e28eb367647f311f88a130bf837fe910e7f180d5477f0e"},
+    {file = "PyVirtualDisplay-3.0.tar.gz", hash = "sha256:09755bc3ceb6eb725fb07eca5425f43f2358d3bf08e00d2a9b792a1aedd16159"},
+]
+
 [[package]]
 name = "pyyaml"
 version = "6.0"
@@ -2341,4 +2367,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "jaraco.test", "more
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9,<3.12"
-content-hash = "cd2c42cf866bcb413b179586067f89aa66f2fb9801ec25580ad346b2620a43d6"
+content-hash = "caee95bcd39e7ffbc69ad262ea0b62c57d085dd0b2dbcb19068ea33c719ee0f0"
diff --git a/pyproject.toml b/pyproject.toml
index 701a7bf..6baf002 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,6 +74,7 @@ python-gnupg = "^0.5.2"
 translate-toolkit = "^3.12.2"
 snakeviz = "^2.2.0"
 pyprof2calltree = "^1.4.5"
+pytest-xvfb = "^3.0.0"
 
 [tool.briefcase.app.bitcoin-safe.macOS]
 universal_build = true
diff --git a/tests/test_signers.py b/tests/test_signers.py
index 9b36876..ad38137 100644
--- a/tests/test_signers.py
+++ b/tests/test_signers.py
@@ -228,18 +228,22 @@ def gen_multisig_descriptor_str(
 
 
 def pytest_bdk_setup_single_sig(network=bdk.Network.REGTEST) -> PyTestBDKSetup:
-
+    logger.debug("pytest_bdk_setup_single_sig start")
     blockchain_config = get_blockchain_config(network=network)
+    logger.debug(f"blockchain_config = {blockchain_config}")
 
     blockchain = bdk.Blockchain(blockchain_config)
+    logger.debug(f"blockchain = {blockchain}")
 
     mnemonic = bdk.Mnemonic.from_string(test_seeds[0])
+    logger.debug(f"mnemonic = {mnemonic}")
 
     descriptor = bdk.Descriptor.new_bip84(
         secret_key=bdk.DescriptorSecretKey(network, mnemonic, ""),
         keychain=bdk.KeychainKind.EXTERNAL,
         network=network,
     )
+    logger.debug(f"descriptor = {descriptor}")
 
     wallet = bdk.Wallet(
         descriptor=descriptor,
@@ -247,17 +251,20 @@ def pytest_bdk_setup_single_sig(network=bdk.Network.REGTEST) -> PyTestBDKSetup:
         network=network,
         database_config=bdk.DatabaseConfig.MEMORY(),
     )
+    logger.debug(f"wallet = {wallet}")
 
     return PyTestBDKSetup(network=network, blockchain=blockchain, descriptors=[descriptor], wallets=[wallet])
 
 
 @pytest.fixture
 def pytest_2_of_3_multisig_wallets() -> PyTestBDKSetup:
+    logger.debug("prepare fixture pytest_2_of_3_multisig_wallets")
     return pytest_bdk_setup_multisig(m=2, n=3, network=bdk.Network.REGTEST)
 
 
 @pytest.fixture
 def pytest_siglesig_wallet() -> PyTestBDKSetup:
+    logger.debug("prepare fixture pytest_siglesig_wallet")
     return pytest_bdk_setup_single_sig(network=bdk.Network.REGTEST)