diff --git a/tests/test_functions.py b/tests/test_functions.py
index 4848581..cefba58 100644
--- a/tests/test_functions.py
+++ b/tests/test_functions.py
@@ -7,6 +7,7 @@
 
 from fast_dev_cli.cli import (
     DryRun,
+    ShellCommandError,
     _ensure_bool,
     exit_if_run_failed,
     get_current_version,
@@ -61,11 +62,14 @@ def test_utils(capsys):
 
 def test_run_shell():
     # current version
-    stream = StringIO()
-    write_to_stream = redirect_stdout(stream)
-    with write_to_stream:
+    with pytest.raises(ShellCommandError):
         get_current_version(True, is_poetry=True)
-    assert "poetry version -s" in stream.getvalue()
+    # TODO: add [tool.poetry] to pyproject.toml
+    # stream = StringIO()
+    # write_to_stream = redirect_stdout(stream)
+    # with write_to_stream:
+    #     get_current_version(True, is_poetry=True)
+    # assert "poetry version -s" in stream.getvalue()
 
     name = "TEST_EXIT_IF_RUN_FAILED"
     value = "foo"
diff --git a/tests/test_upgrade.py b/tests/test_upgrade.py
index 5f79467..2e6f9f2 100644
--- a/tests/test_upgrade.py
+++ b/tests/test_upgrade.py
@@ -162,6 +162,7 @@ def test_get_dev_dependencies(tmp_path: Path):
         run_and_echo(f"poetry new {project.name}")
         with chdir(project):
             with project.joinpath(TOML_FILE).open("a") as f:
+                f.write('\n[tool.poetry.dependencies]\nsix="*"')
                 f.write(dev_text)
             assert UpgradeDependencies.get_args() == (
                 [],
diff --git a/tests/test_version.py b/tests/test_version.py
index b8c61ed..0cede08 100644
--- a/tests/test_version.py
+++ b/tests/test_version.py
@@ -1,9 +1,12 @@
 import re
 from pathlib import Path
 
+import pytest
+
 from fast_dev_cli import __version__
 from fast_dev_cli.cli import (
     TOML_FILE,
+    ShellCommandError,
     _parse_version,
     get_current_version,
     read_version_from_file,
@@ -17,8 +20,9 @@ def test_version(capsys):
     version()
     assert get_current_version(is_poetry=False) in capsys.readouterr().out
     assert get_current_version(is_poetry=False) == __version__
-    assert get_current_version(is_poetry=True) == ""
     assert get_current_version() == __version__
+    with pytest.raises(ShellCommandError):
+        get_current_version(is_poetry=True)
 
 
 def test_read_version(tmp_path: Path, capsys):