diff --git a/deptry/dependency_getter/poetry.py b/deptry/dependency_getter/poetry.py
index 8cafdcde..31c88f23 100644
--- a/deptry/dependency_getter/poetry.py
+++ b/deptry/dependency_getter/poetry.py
@@ -43,10 +43,16 @@ def _get_poetry_dev_dependencies(self) -> list[Dependency]:
         pyproject_data = load_pyproject_toml(self.config)
 
         with contextlib.suppress(KeyError):
-            dependencies = {**pyproject_data["tool"]["poetry"]["dev-dependencies"], **dependencies}
+            dependencies = {**dependencies, **pyproject_data["tool"]["poetry"]["dev-dependencies"]}
 
-        with contextlib.suppress(KeyError):
-            dependencies = {**pyproject_data["tool"]["poetry"]["group"]["dev"]["dependencies"], **dependencies}
+        try:
+            dependency_groups = pyproject_data["tool"]["poetry"]["group"]
+        except KeyError:
+            dependency_groups = {}
+
+        for group_values in dependency_groups.values():
+            with contextlib.suppress(KeyError):
+                dependencies = {**dependencies, **group_values["dependencies"]}
 
         return self._get_dependencies(dependencies, self.package_module_name_map)
 
diff --git a/tests/data/project_with_poetry/poetry.toml b/tests/data/project_with_poetry/poetry.toml
new file mode 100644
index 00000000..ab1033bd
--- /dev/null
+++ b/tests/data/project_with_poetry/poetry.toml
@@ -0,0 +1,2 @@
+[virtualenvs]
+in-project = true
diff --git a/tests/data/project_with_poetry/pyproject.toml b/tests/data/project_with_poetry/pyproject.toml
new file mode 100644
index 00000000..ad787461
--- /dev/null
+++ b/tests/data/project_with_poetry/pyproject.toml
@@ -0,0 +1,33 @@
+[tool.poetry]
+name = "test"
+version = "0.0.1"
+description = "A test project"
+authors = ["test <test@test.com>"]
+
+[tool.poetry.dependencies]
+python = ">=3.7"
+pkginfo = ">=1.8.3"
+toml = "*"
+urllib3 = ">=1.26.12"
+
+click = { version = ">=8.1.3", optional = true }
+isort = { version = ">=5.10.1", optional = true }
+requests = { version = ">=2.28.1", optional = true }
+
+[tool.poetry.extras]
+foo = [
+    "click",
+    "isort",
+]
+bar = ["requests"]
+
+[tool.poetry.group.lint.dependencies]
+black = "^22.6.0"
+mypy = "^1.3.0"
+
+[tool.poetry.group.test.dependencies]
+pytest = "^7.3.0"
+pytest-cov = "^4.0.0"
+
+[tool.deptry]
+ignore_unused = ["pkginfo"]
diff --git a/tests/data/project_with_poetry/src/main.py b/tests/data/project_with_poetry/src/main.py
new file mode 100644
index 00000000..7d5e2312
--- /dev/null
+++ b/tests/data/project_with_poetry/src/main.py
@@ -0,0 +1,10 @@
+from os import chdir, walk
+from pathlib import Path
+
+import black
+import click
+import mypy
+import pytest
+import pytest_cov
+import white as w
+from urllib3 import contrib
diff --git a/tests/data/project_with_poetry/src/notebook.ipynb b/tests/data/project_with_poetry/src/notebook.ipynb
new file mode 100644
index 00000000..a51bdb9d
--- /dev/null
+++ b/tests/data/project_with_poetry/src/notebook.ipynb
@@ -0,0 +1,37 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "9f4924ec-2200-4801-9d49-d4833651cbc4",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import click\n",
+    "from urllib3 import contrib\n",
+    "import toml"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.11"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/tests/functional/cli/test_cli_poetry.py b/tests/functional/cli/test_cli_poetry.py
new file mode 100644
index 00000000..e12c7a33
--- /dev/null
+++ b/tests/functional/cli/test_cli_poetry.py
@@ -0,0 +1,105 @@
+from __future__ import annotations
+
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+from click.testing import CliRunner
+
+from deptry.cli import deptry
+from tests.utils import get_issues_report, run_within_dir
+
+if TYPE_CHECKING:
+    from tests.functional.types import ToolSpecificProjectBuilder
+
+
+def test_cli_with_poetry(poetry_project_builder: ToolSpecificProjectBuilder) -> None:
+    with run_within_dir(poetry_project_builder("project_with_poetry")):
+        result = CliRunner().invoke(deptry, ". -o report.json")
+
+        assert result.exit_code == 1
+        assert get_issues_report() == [
+            {
+                "error": {
+                    "code": "DEP002",
+                    "message": "'isort' defined as a dependency but not used in the codebase",
+                },
+                "module": "isort",
+                "location": {
+                    "file": str(Path("pyproject.toml")),
+                    "line": None,
+                    "column": None,
+                },
+            },
+            {
+                "error": {
+                    "code": "DEP002",
+                    "message": "'requests' defined as a dependency but not used in the codebase",
+                },
+                "module": "requests",
+                "location": {
+                    "file": str(Path("pyproject.toml")),
+                    "line": None,
+                    "column": None,
+                },
+            },
+            {
+                "error": {
+                    "code": "DEP004",
+                    "message": "'black' imported but declared as a dev dependency",
+                },
+                "module": "black",
+                "location": {
+                    "file": str(Path("src/main.py")),
+                    "line": 4,
+                    "column": 0,
+                },
+            },
+            {
+                "error": {
+                    "code": "DEP004",
+                    "message": "'mypy' imported but declared as a dev dependency",
+                },
+                "module": "mypy",
+                "location": {
+                    "file": str(Path("src/main.py")),
+                    "line": 6,
+                    "column": 0,
+                },
+            },
+            {
+                "error": {
+                    "code": "DEP004",
+                    "message": "'pytest' imported but declared as a dev dependency",
+                },
+                "module": "pytest",
+                "location": {
+                    "file": str(Path("src/main.py")),
+                    "line": 7,
+                    "column": 0,
+                },
+            },
+            {
+                "error": {
+                    "code": "DEP004",
+                    "message": "'pytest_cov' imported but declared as a dev dependency",
+                },
+                "module": "pytest_cov",
+                "location": {
+                    "file": str(Path("src/main.py")),
+                    "line": 8,
+                    "column": 0,
+                },
+            },
+            {
+                "error": {
+                    "code": "DEP001",
+                    "message": "'white' imported but missing from the dependency definitions",
+                },
+                "module": "white",
+                "location": {
+                    "file": str(Path("src/main.py")),
+                    "line": 9,
+                    "column": 0,
+                },
+            },
+        ]
diff --git a/tests/unit/dependency_getter/test_poetry.py b/tests/unit/dependency_getter/test_poetry.py
index 1da321d0..c0cdad8f 100644
--- a/tests/unit/dependency_getter/test_poetry.py
+++ b/tests/unit/dependency_getter/test_poetry.py
@@ -7,7 +7,8 @@
 
 
 def test_dependency_getter(tmp_path: Path) -> None:
-    fake_pyproject_toml = """[tool.poetry.dependencies]
+    fake_pyproject_toml = """
+[tool.poetry.dependencies]
 python = ">=3.7,<4.0"
 bar =  { version = ">=2.5.1,<4.0.0", python = ">3.7" }
 foo-bar =  { version = ">=2.5.1,<4.0.0", optional = true, python = ">3.7" }
@@ -15,7 +16,16 @@ def test_dependency_getter(tmp_path: Path) -> None:
 
 [tool.poetry.dev-dependencies]
 toml = "^0.10.2"
-qux =  { version = ">=2.5.1,<4.0.0", optional = true }"""
+qux =  { version = ">=2.5.1,<4.0.0", optional = true }
+
+[tool.poetry.group.lint.dependencies]
+black = "^22.6.0"
+mypy = "^1.3.0"
+
+[tool.poetry.group.test.dependencies]
+pytest = "^7.3.0"
+pytest-cov = "^4.0.0"
+"""
 
     with run_within_dir(tmp_path):
         with Path("pyproject.toml").open("w") as f:
@@ -30,7 +40,7 @@ def test_dependency_getter(tmp_path: Path) -> None:
         dev_dependencies = dependencies_extract.dev_dependencies
 
         assert len(dependencies) == 3
-        assert len(dev_dependencies) == 2
+        assert len(dev_dependencies) == 6
 
         assert dependencies[0].name == "bar"
         assert dependencies[0].is_conditional
@@ -56,3 +66,23 @@ def test_dependency_getter(tmp_path: Path) -> None:
         assert not dev_dependencies[1].is_conditional
         assert dev_dependencies[1].is_optional
         assert "qux" in dev_dependencies[1].top_levels
+
+        assert dev_dependencies[2].name == "black"
+        assert not dev_dependencies[2].is_conditional
+        assert not dev_dependencies[2].is_optional
+        assert "black" in dev_dependencies[2].top_levels
+
+        assert dev_dependencies[3].name == "mypy"
+        assert not dev_dependencies[3].is_conditional
+        assert not dev_dependencies[3].is_optional
+        assert "mypy" in dev_dependencies[3].top_levels
+
+        assert dev_dependencies[4].name == "pytest"
+        assert not dev_dependencies[4].is_conditional
+        assert not dev_dependencies[4].is_optional
+        assert "pytest" in dev_dependencies[4].top_levels
+
+        assert dev_dependencies[5].name == "pytest-cov"
+        assert not dev_dependencies[5].is_conditional
+        assert not dev_dependencies[5].is_optional
+        assert "pytest_cov" in dev_dependencies[5].top_levels