diff --git a/tests/unit/test_parsers.py b/tests/unit/test_parsers.py
new file mode 100644
index 0000000..4429e0c
--- /dev/null
+++ b/tests/unit/test_parsers.py
@@ -0,0 +1,255 @@
+"""Unit tests for the parsers module."""
+
+import pytest
+from unittest.mock import Mock, patch, MagicMock
+
+from scaffoldforge.parsers import IssueParser, IssueData, ChecklistItem
+
+
+class TestChecklistItem:
+    """Tests for ChecklistItem dataclass."""
+
+    def test_checklist_item_creation(self):
+        """Test creating a checklist item."""
+        item = ChecklistItem(
+            text="Implement feature",
+            completed=False,
+            line_number=5,
+            category="Implementation"
+        )
+        assert item.text == "Implement feature"
+        assert item.completed is False
+        assert item.line_number == 5
+        assert item.category == "Implementation"
+
+    def test_checklist_item_completed(self):
+        """Test completed checklist item."""
+        item = ChecklistItem(
+            text="Completed task",
+            completed=True,
+            line_number=10
+        )
+        assert item.completed is True
+
+
+class TestIssueData:
+    """Tests for IssueData dataclass."""
+
+    def test_issue_data_creation(self):
+        """Test creating issue data."""
+        data = IssueData(
+            number=123,
+            title="Test Issue",
+            body="Test body",
+            body_html="<p>Test body</p>",
+            labels=["bug", "priority"],
+            state="open",
+            url="https://github.com/user/repo/issues/123",
+            repository="user/repo",
+            author="testuser",
+            created_at="2024-01-01T00:00:00",
+            updated_at="2024-01-02T00:00:00"
+        )
+        assert data.number == 123
+        assert data.title == "Test Issue"
+        assert data.labels == ["bug", "priority"]
+
+    def test_get_todo_items(self):
+        """Test getting incomplete todo items."""
+        checklist = [
+            ChecklistItem(text="Task 1", completed=False),
+            ChecklistItem(text="Task 2", completed=True),
+            ChecklistItem(text="Task 3", completed=False),
+        ]
+        data = IssueData(
+            number=1, title="Test", body="", body_html="",
+            labels=[], state="open", url="", repository="", author="",
+            created_at="", updated_at="", checklist=checklist
+        )
+        todos = data.get_todo_items()
+        assert len(todos) == 2
+        assert "Task 1" in todos
+        assert "Task 3" in todos
+        assert "Task 2" not in todos
+
+    def test_get_completed_items(self):
+        """Test getting completed items."""
+        checklist = [
+            ChecklistItem(text="Task 1", completed=False),
+            ChecklistItem(text="Task 2", completed=True),
+        ]
+        data = IssueData(
+            number=1, title="Test", body="", body_html="",
+            labels=[], state="open", url="", repository="", author="",
+            created_at="", updated_at="", checklist=checklist
+        )
+        completed = data.get_completed_items()
+        assert len(completed) == 1
+        assert "Task 2" in completed
+
+    def test_generate_todo_comments(self):
+        """Test generating TODO comments."""
+        checklist = [
+            ChecklistItem(text="Implement feature", completed=False),
+            ChecklistItem(text="Write tests", completed=False),
+        ]
+        data = IssueData(
+            number=42, title="Test", body="", body_html="",
+            labels=[], state="open", url="", repository="", author="",
+            created_at="", updated_at="", checklist=checklist
+        )
+        comments = data.generate_todo_comments()
+        assert "TODO #1: Implement feature" in comments
+        assert "TODO #2: Write tests" in comments
+
+
+class TestIssueParser:
+    """Tests for IssueParser class."""
+
+    @patch('scaffoldforge.parsers.issue_parser.Github')
+    def test_parser_initialization_without_token(self, mock_github):
+        """Test parser initialization without token."""
+        parser = IssueParser()
+        mock_github.assert_called_once()
+
+    @patch('scaffoldforge.parsers.issue_parser.Github')
+    def test_parser_initialization_with_token(self, mock_github):
+        """Test parser initialization with token."""
+        parser = IssueParser(token="test_token")
+        mock_github.assert_called_once_with("test_token")
+
+    def test_parse_checklist_simple(self):
+        """Test parsing simple checklist items."""
+        parser = IssueParser()
+        body = """
+## Tasks
+- [x] Completed task
+- [ ] Pending task
+- [X] Also completed
+        """
+        checklist = parser._parse_checklist(body)
+        assert len(checklist) == 3
+        assert checklist[0].text == "Completed task"
+        assert checklist[0].completed is True
+        assert checklist[1].text == "Pending task"
+        assert checklist[1].completed is False
+
+    def test_parse_checklist_with_categories(self):
+        """Test parsing checklist with category headers."""
+        parser = IssueParser()
+        body = """
+## Implementation
+- [ ] Task 1
+- [ ] Task 2
+
+## Testing
+- [ ] Test 1
+        """
+        checklist = parser._parse_checklist(body)
+        assert len(checklist) == 3
+        assert checklist[0].category == "Implementation"
+        assert checklist[2].category == "Testing"
+
+    def test_parse_requirements(self):
+        """Test parsing requirements section."""
+        parser = IssueParser()
+        body = """
+## Requirements
+- Must work
+- Must be fast
+- Must be secure
+        """
+        requirements = parser._parse_requirements(body)
+        assert len(requirements) == 3
+        assert "Must work" in requirements
+
+    def test_parse_acceptance_criteria(self):
+        """Test parsing acceptance criteria."""
+        parser = IssueParser()
+        body = """
+## Acceptance Criteria
+- [x] Feature works
+- [ ] Tests pass
+        """
+        criteria = parser._parse_acceptance_criteria(body)
+        assert len(criteria) == 2
+        assert "Feature works" in criteria
+
+    def test_parse_file_paths(self):
+        """Test parsing file paths from body."""
+        parser = IssueParser()
+        body = """
+Create a new file `src/main.py`
+Also need `utils.py`
+        """
+        files = parser._parse_file_paths(body)
+        assert len(files) >= 2
+
+    def test_detect_language_from_labels(self):
+        """Test language detection from labels."""
+        parser = IssueParser()
+        issue_data = IssueData(
+            number=1, title="Test", body="", body_html="",
+            labels=["python", "enhancement"], state="open", url="",
+            repository="", author="", created_at="", updated_at=""
+        )
+        lang = parser.detect_language(issue_data)
+        assert lang == "python"
+
+    def test_detect_language_from_body(self):
+        """Test language detection from body content."""
+        parser = IssueParser()
+        issue_data = IssueData(
+            number=1, title="Test", body="This is a Go project",
+            body_html="", labels=[], state="open", url="",
+            repository="", author="", created_at="", updated_at=""
+        )
+        lang = parser.detect_language(issue_data)
+        assert lang == "go"
+
+    def test_detect_language_unknown(self):
+        """Test language detection when unknown."""
+        parser = IssueParser()
+        issue_data = IssueData(
+            number=1, title="Test", body="No language mentioned",
+            body_html="", labels=[], state="open", url="",
+            repository="", author="", created_at="", updated_at=""
+        )
+        lang = parser.detect_language(issue_data)
+        assert lang is None
+
+    def test_detect_project_type_cli(self):
+        """Test CLI project type detection."""
+        parser = IssueParser()
+        issue_data = IssueData(
+            number=1, title="Create a CLI tool",
+            body="Need to build a command line interface",
+            body_html="", labels=[], state="open", url="",
+            repository="", author="", created_at="", updated_at=""
+        )
+        proj_type = parser.detect_project_type(issue_data)
+        assert proj_type == "cli"
+
+    def test_detect_project_type_api(self):
+        """Test API project type detection."""
+        parser = IssueParser()
+        issue_data = IssueData(
+            number=1, title="Create REST API",
+            body="Build an API endpoint",
+            body_html="", labels=[], state="open", url="",
+            repository="", author="", created_at="", updated_at=""
+        )
+        proj_type = parser.detect_project_type(issue_data)
+        assert proj_type == "api"
+
+    def test_empty_body_handling(self):
+        """Test handling of empty body."""
+        parser = IssueParser()
+        checklist = parser._parse_checklist("")
+        assert len(checklist) == 0
+
+        requirements = parser._parse_requirements("")
+        assert len(requirements) == 0
+
+        files = parser._parse_file_paths("")
+        assert len(files) == 0