diff --git a/src/quality_result_gui_plugin/env.py b/src/quality_result_gui/env.py
similarity index 79%
rename from src/quality_result_gui_plugin/env.py
rename to src/quality_result_gui/env.py
index 23ff99e..cb67d85 100644
--- a/src/quality_result_gui_plugin/env.py
+++ b/src/quality_result_gui/env.py
@@ -18,9 +18,21 @@
 #  along with quality-result-gui. If not, see <https://www.gnu.org/licenses/>.
 
 import os
+from pathlib import Path
 
 IS_DEVELOPMENT_MODE = os.environ.get("IS_DEVELOPMENT_MODE", "0").lower() in (
     "1",
     "true",
     "yes",
 )
+
+TEST_JSON_FILE_PATH = (
+    str(
+        (
+            Path(__file__).parent
+            / "dev_tools/example_quality_errors/quality_errors.json"
+        ).resolve()
+    )
+    if IS_DEVELOPMENT_MODE
+    else None
+)
diff --git a/src/quality_result_gui/quality_error_visualizer.py b/src/quality_result_gui/quality_error_visualizer.py
index dfcf406..11d21ce 100644
--- a/src/quality_result_gui/quality_error_visualizer.py
+++ b/src/quality_result_gui/quality_error_visualizer.py
@@ -17,17 +17,24 @@
 #  You should have received a copy of the GNU General Public License
 #  along with quality-result-gui. If not, see <https://www.gnu.org/licenses/>.
 
+import json
 import logging
-from typing import Iterable, List, Optional
+from pathlib import Path
+from typing import Iterable, List, Optional, cast
 
 from qgis.core import QgsAnnotationLayer, QgsCoordinateReferenceSystem, QgsProject
+from qgis.gui import QgisInterface
+from qgis.utils import iface as utils_iface
 
 from quality_result_gui.api.types.quality_error import QualityError
 from quality_result_gui.configuration import QualityLayerStyleConfig
+from quality_result_gui.env import IS_DEVELOPMENT_MODE, TEST_JSON_FILE_PATH
 from quality_result_gui.quality_layer import QualityErrorLayer
 from quality_result_gui.ui.quality_error_tree_view import SelectionType
 from quality_result_gui.utils import layer_utils
 
+iface = cast(QgisInterface, utils_iface)
+
 LOGGER = logging.getLogger(__name__)
 
 
@@ -62,6 +69,17 @@ def add_new_errors(self, quality_errors: Iterable[QualityError]) -> None:
                 quality_error, use_highlighted_style=False
             )
 
+        # In dev mode define map extent when all errors are added to layer
+        if IS_DEVELOPMENT_MODE and TEST_JSON_FILE_PATH:
+            layer = self._quality_error_layer.find_layer_from_project()
+            amount_of_added_errors = len(layer.items().keys()) if layer else 0
+            if (
+                len(json.loads(Path(TEST_JSON_FILE_PATH).read_text()))
+                == amount_of_added_errors
+                and layer
+            ):
+                iface.mapCanvas().setExtent(layer.extent())
+
     def remove_errors(self, quality_errors: Iterable[QualityError]) -> None:
         errors = list(quality_errors)
         self._quality_error_layer.remove_annotations(errors)
diff --git a/src/quality_result_gui_plugin/plugin.py b/src/quality_result_gui_plugin/plugin.py
index 1e7aa30..aa8fc66 100644
--- a/src/quality_result_gui_plugin/plugin.py
+++ b/src/quality_result_gui_plugin/plugin.py
@@ -34,10 +34,10 @@
 
 import quality_result_gui
 import quality_result_gui_plugin
+from quality_result_gui.env import IS_DEVELOPMENT_MODE, TEST_JSON_FILE_PATH
 from quality_result_gui.quality_error_manager import QualityResultManager
 from quality_result_gui_plugin.dev_tools.dev_tools_dialog import DevToolsDialog
 from quality_result_gui_plugin.dev_tools.mock_api_client import MockQualityResultClient
-from quality_result_gui_plugin.env import IS_DEVELOPMENT_MODE
 
 LOGGER = logging.getLogger(__name__)
 
@@ -86,13 +86,7 @@ def initGui(self) -> None:  # noqa: N802 (qgis naming)
 
         # Add shortcut action to open qulity results form example json when in dev mode
         if IS_DEVELOPMENT_MODE and self.dev_tool_action is None:
-
-            self._test_json_file_path = str(
-                (
-                    Path(__file__).parent
-                    / "dev_tools/example_quality_errors/quality_errors.json"
-                ).resolve()
-            )
+            self._test_json_file_path = TEST_JSON_FILE_PATH or ""
             self.dev_tool_action = QAction(
                 QIcon(resources_path("icons/quality_result_gui.svg")),
                 "Test quality result GUI",
@@ -122,7 +116,6 @@ def _unload_quality_error_manager_if_exists(self) -> None:
             self.quality_error_manager = None
 
     def _on_open_dev_tools_called(self) -> None:
-
         dialog = DevToolsDialog(iface.mainWindow())
         if dialog.exec_():
             self._test_json_file_path = (