diff --git a/tests/unit/tools/test_text_input.py b/tests/unit/tools/test_text_input.py
new file mode 100644
index 0000000..8494ec7
--- /dev/null
+++ b/tests/unit/tools/test_text_input.py
@@ -0,0 +1,194 @@
+"""
+Unit tests for Text Input node
+Following TDD principles - these tests define the expected behavior
+"""
+
+from kikotools.tools.text_input.node import TextInputNode
+
+
+class TestTextInputNode:
+    """Test the Text Input ComfyUI node"""
+
+    def test_node_has_correct_comfyui_attributes(self):
+        """Test node has all required ComfyUI attributes"""
+        # Check class attributes exist
+        assert hasattr(TextInputNode, "INPUT_TYPES")
+        assert hasattr(TextInputNode, "RETURN_TYPES")
+        assert hasattr(TextInputNode, "RETURN_NAMES")
+        assert hasattr(TextInputNode, "FUNCTION")
+        assert hasattr(TextInputNode, "CATEGORY")
+
+        # Check category is correct
+        assert TextInputNode.CATEGORY == "🫶 ComfyAssets/📝 Text"
+
+        # Check return types
+        assert TextInputNode.RETURN_TYPES == ("STRING",)
+        assert TextInputNode.RETURN_NAMES == ("text",)
+
+        # Check function name
+        assert TextInputNode.FUNCTION == "execute"
+
+    def test_input_types_structure(self):
+        """Test INPUT_TYPES has correct structure"""
+        input_types = TextInputNode.INPUT_TYPES()
+
+        assert "required" in input_types
+
+        # Check text input configuration
+        assert "text" in input_types["required"]
+        text_config = input_types["required"]["text"]
+        assert text_config[0] == "STRING"
+        assert "multiline" in text_config[1]
+        assert text_config[1]["multiline"] is True
+        assert "default" in text_config[1]
+        assert text_config[1]["default"] == ""
+
+    def test_execute_returns_input_text(self):
+        """Test that execute method returns the input text"""
+        node = TextInputNode()
+
+        test_text = "Hello, ComfyUI!"
+        result = node.execute(test_text)
+
+        assert isinstance(result, tuple)
+        assert len(result) == 1
+        assert result[0] == test_text
+
+    def test_execute_handles_empty_string(self):
+        """Test that execute handles empty string input"""
+        node = TextInputNode()
+
+        result = node.execute("")
+
+        assert isinstance(result, tuple)
+        assert len(result) == 1
+        assert result[0] == ""
+
+    def test_execute_handles_multiline_text(self):
+        """Test that execute handles multiline text"""
+        node = TextInputNode()
+
+        multiline_text = """Line 1
+Line 2
+Line 3"""
+
+        result = node.execute(multiline_text)
+
+        assert isinstance(result, tuple)
+        assert result[0] == multiline_text
+        assert "\n" in result[0]
+
+    def test_execute_handles_special_characters(self):
+        """Test that execute handles special characters"""
+        node = TextInputNode()
+
+        special_text = "Special: @#$%^&*()[]{}|\\;:'\",.<>?/`~"
+        result = node.execute(special_text)
+
+        assert result[0] == special_text
+
+    def test_execute_handles_unicode(self):
+        """Test that execute handles unicode characters"""
+        node = TextInputNode()
+
+        unicode_text = "Unicode: 你好 🎨 émoji café"
+        result = node.execute(unicode_text)
+
+        assert result[0] == unicode_text
+
+    def test_execute_handles_very_long_text(self):
+        """Test that execute handles very long text"""
+        node = TextInputNode()
+
+        long_text = "A" * 10000
+        result = node.execute(long_text)
+
+        assert result[0] == long_text
+        assert len(result[0]) == 10000
+
+    def test_inherits_from_base_node(self):
+        """Test that node inherits from ComfyAssetsBaseNode"""
+        from kikotools.base import ComfyAssetsBaseNode
+
+        assert issubclass(TextInputNode, ComfyAssetsBaseNode)
+
+        # Test inherited functionality
+        node = TextInputNode()
+        node_info = node.get_node_info()
+
+        assert node_info["category"] == "🫶 ComfyAssets/📝 Text"
+        assert node_info["class_name"] == "TextInputNode"
+
+    def test_node_description_exists(self):
+        """Test that node has a description"""
+        assert hasattr(TextInputNode, "DESCRIPTION")
+        assert isinstance(TextInputNode.DESCRIPTION, str)
+        assert len(TextInputNode.DESCRIPTION) > 0
+
+
+class TestTextInputIntegration:
+    """Test real-world usage scenarios"""
+
+    def test_simple_text_passthrough(self):
+        """Test simple text input and output"""
+        node = TextInputNode()
+
+        input_text = "This is a test prompt for Stable Diffusion"
+        output = node.execute(input_text)
+
+        assert output[0] == input_text
+
+    def test_prompt_workflow_scenario(self):
+        """Test typical prompt workflow usage"""
+        node = TextInputNode()
+
+        positive_prompt = "beautiful sunset, high quality, detailed, 8k"
+        result = node.execute(positive_prompt)
+
+        # Should pass through unchanged for connecting to CLIP text encoder
+        assert result[0] == positive_prompt
+
+    def test_multiline_prompt_scenario(self):
+        """Test multiline prompt with embedding syntax"""
+        node = TextInputNode()
+
+        complex_prompt = """masterpiece, best quality, (detailed face:1.2)
+1girl, standing, outdoor
+<lora:style_v1:0.7>
+--neg-- blurry, low quality"""
+
+        result = node.execute(complex_prompt)
+
+        assert result[0] == complex_prompt
+        assert result[0].count("\n") == 3
+
+    def test_empty_text_workflow(self):
+        """Test workflow with empty text (valid use case for negative prompt)"""
+        node = TextInputNode()
+
+        result = node.execute("")
+
+        # Empty string is valid - some users leave negative prompt empty
+        assert result[0] == ""
+
+    def test_text_with_comfyui_wildcards(self):
+        """Test text containing ComfyUI wildcard syntax"""
+        node = TextInputNode()
+
+        wildcard_text = "{summer|winter|autumn} scene with {cat|dog}"
+        result = node.execute(wildcard_text)
+
+        assert result[0] == wildcard_text
+
+    def test_node_chaining_scenario(self):
+        """Test that output can be used in node chaining"""
+        node1 = TextInputNode()
+        node2 = TextInputNode()
+
+        # First node produces text
+        output1 = node1.execute("First node text")
+
+        # Second node could receive it (though unusual pattern)
+        output2 = node2.execute(output1[0])
+
+        assert output2[0] == "First node text"