diff --git a/app/tests/test_profile.py b/app/tests/test_profile.py
new file mode 100644
index 0000000..4ba78d3
--- /dev/null
+++ b/app/tests/test_profile.py
@@ -0,0 +1,86 @@
+"""Tests for profile management module."""
+
+import pytest
+from pathlib import Path
+import tempfile
+import os
+
+
+class TestProfileManagement:
+    """Test cases for profile management."""
+
+    def test_init_project(self, temp_dir):
+        """Test project initialization."""
+        from env_pro.core.profile import init_project, get_profiles_dir
+
+        profiles_dir = init_project(temp_dir)
+
+        assert profiles_dir.exists()
+        assert (profiles_dir / "default").exists()
+        assert (profiles_dir / "default" / ".env").exists()
+        assert (profiles_dir / ".active").exists()
+
+    def test_list_profiles_empty(self, temp_dir):
+        """Test listing profiles when none exist."""
+        from env_pro.core.profile import list_profiles
+
+        profiles = list_profiles(temp_dir)
+        assert profiles == []
+
+    def test_create_profile(self, temp_dir):
+        """Test creating a new profile."""
+        from env_pro.core.profile import create_profile, list_profiles
+
+        create_profile("dev", temp_dir)
+        profiles = list_profiles(temp_dir)
+
+        assert "dev" in profiles
+        assert (temp_dir / ".env-profiles" / "dev" / ".env").exists()
+
+    def test_delete_profile(self, temp_dir):
+        """Test deleting a profile."""
+        from env_pro.core.profile import create_profile, delete_profile, list_profiles
+
+        create_profile("test", temp_dir)
+        delete_profile("test", temp_dir)
+        profiles = list_profiles(temp_dir)
+
+        assert "test" not in profiles
+
+    def test_set_active_profile(self, temp_dir):
+        """Test setting active profile."""
+        from env_pro.core.profile import create_profile, set_active_profile, get_active_profile
+
+        create_profile("staging", temp_dir)
+        set_active_profile("staging", temp_dir)
+
+        active = get_active_profile(temp_dir)
+        assert active == "staging"
+
+    def test_get_profile_vars(self, project_dir):
+        """Test getting variables from a profile."""
+        from env_pro.core.profile import get_profile_vars
+
+        vars = get_profile_vars("default", project_dir)
+
+        assert "DATABASE_URL" in vars
+        assert vars["DATABASE_URL"] == "postgresql://localhost:5432/db"
+        assert vars["DEBUG"] == "true"
+
+    def test_set_profile_var(self, project_dir):
+        """Test setting a variable in a profile."""
+        from env_pro.core.profile import set_profile_var, get_profile_vars
+
+        set_profile_var("default", "NEW_VAR", "new-value", project_dir)
+
+        vars = get_profile_vars("default", project_dir)
+        assert vars["NEW_VAR"] == "new-value"
+
+    def test_delete_profile_var(self, project_dir):
+        """Test deleting a variable from a profile."""
+        from env_pro.core.profile import delete_profile_var, get_profile_vars
+
+        delete_profile_var("default", "DEBUG", project_dir)
+
+        vars = get_profile_vars("default", project_dir)
+        assert "DEBUG" not in vars