diff --git a/countess/plugins/hgvs_parser.py b/countess/plugins/hgvs_parser.py
index a5b4b4f..29ccf7e 100644
--- a/countess/plugins/hgvs_parser.py
+++ b/countess/plugins/hgvs_parser.py
@@ -39,18 +39,17 @@ def process_dict(self, data: dict):
             output["prefix"] = m.group(2)
             value = m.group(3)
 
-        if value == "=":
-            variations = []
-        else:
+        variations: list[str] = []
+        if value != "=":
             if value.startswith("[") and value.endswith("]"):
                 value = value[1:-1]
             variations = value.split(";")
 
-        for n, g in enumerate(guides, 1):
-            output[f"guide_{n}"] = g in variations
+            for n, g in enumerate(guides, 1):
+                output[f"guide_{n}"] = g in variations
 
-        max_variations = int(self.max_var)
-        variations = [v for v in variations if v not in guides]
+            max_variations = int(self.max_var)
+            variations = [v for v in variations if v not in guides]
 
         output_vars: list[Optional[str]] = [None] * max_variations
         output_locs: list[Optional[str]] = [None] * max_variations
diff --git a/tests/gui/test_actions.py b/tests/gui/test_actions.py
index 5bc7f21..7d19241 100644
--- a/tests/gui/test_actions.py
+++ b/tests/gui/test_actions.py
@@ -5,26 +5,28 @@
 
 import pytest
 
-from countess.gui.main import MainWindow, make_root, PluginChooserFrame
 from countess.gui.config import PluginConfigurator
+from countess.gui.main import MainWindow, PluginChooserFrame, make_root
 from countess.gui.tabular import TabularDataFrame
 from countess.plugins.csv import LoadCsvPlugin
 
-def _find_buttons(frame: tk.Frame, label: str) -> Iterable[tk.Button]:
 
+def _find_buttons(frame: tk.Frame, label: str) -> Iterable[tk.Button]:
     for w in frame.winfo_children():
         if isinstance(w, tk.Button):
-            if w['text'] == label:
+            if w["text"] == label:
                 yield w
         elif isinstance(w, (tk.Frame, tk.LabelFrame)):
             yield from _find_buttons(w, label)
 
+
 def _find_button(frame: tk.Frame, label: str) -> Optional[tk.Button]:
     try:
         return next(iter(_find_buttons(frame, label)))
     except StopIteration:
         return None
 
+
 @pytest.mark.gui
 def test_open_new():
     root = make_root()
@@ -33,7 +35,7 @@ def test_open_new():
 
     assert isinstance(mw.config_wrapper.config_subframe, PluginChooserFrame)
 
-    button = _find_button(mw.config_wrapper.config_subframe, 'CSV Load')
+    button = _find_button(mw.config_wrapper.config_subframe, "CSV Load")
     button.invoke()
     root.update()
 
@@ -41,7 +43,7 @@ def test_open_new():
     plugin = mw.config_wrapper.configurator.plugin
     assert isinstance(plugin, LoadCsvPlugin)
 
-    with patch('tkinter.filedialog.askopenfilenames', return_value=['tests/input1.csv']):
+    with patch("tkinter.filedialog.askopenfilenames", return_value=["tests/input1.csv"]):
         button = _find_button(mw.config_wrapper.config_subframe, "")
         button.invoke()
         root.update()
diff --git a/tests/test_cmd.py b/tests/test_cmd.py
index 8f01fd9..18cb011 100644
--- a/tests/test_cmd.py
+++ b/tests/test_cmd.py
@@ -1,4 +1,5 @@
 import csv
+import time
 from unittest.mock import patch
 
 import pytest
@@ -16,7 +17,7 @@
 @pytest.mark.slow
 def test_command_invocation():
     run(["countess_cmd", "tests/simple.ini"])
-
+    time.sleep(0.5)
     with open("tests/output.csv", "r", encoding="utf-8") as fh:
         output = fh.read()
         assert output == expected_output