diff --git a/packages/smtp_config/seed/scripts/tests/smtp.test.lua b/packages/smtp_config/seed/scripts/tests/smtp.test.lua
new file mode 100644
index 000000000..7ceefc5f2
--- /dev/null
+++ b/packages/smtp_config/seed/scripts/tests/smtp.test.lua
@@ -0,0 +1,63 @@
+-- SMTP module tests
+-- Uses lua_test framework with parameterized test cases
+
+describe("SMTP Module", function()
+  local cases = load_cases("smtp.cases.json")
+  local smtp = require("smtp")
+
+  describe("getDefaults", function()
+    it_each(cases.getDefaults, "$desc", function(tc)
+      local result = smtp.getDefaults()
+      expect(result).toBeDefined()
+      for _, key in ipairs(tc.expected_keys) do
+        expect(result[key]).toBeDefined()
+      end
+    end)
+  end)
+
+  describe("getFields", function()
+    it_each(cases.getFields, "$desc", function(tc)
+      local result = smtp.getFields()
+      expect(#result).toBe(tc.expected_count)
+    end)
+  end)
+
+  describe("getField", function()
+    it("returns field definition by name", function()
+      local field = smtp.getField("host")
+      expect(field).toBeDefined()
+      expect(field.name).toBe("host")
+      expect(field.label).toBeDefined()
+    end)
+
+    it("returns nil for non-existent field", function()
+      local field = smtp.getField("nonexistent")
+      expect(field).toBeNil()
+    end)
+  end)
+
+  describe("validate", function()
+    it_each(cases.validate.valid, "$desc", function(tc)
+      local result = smtp.validate(tc.input)
+      expect(result.valid).toBe(true)
+      expect(next(result.errors)).toBe(nil)
+    end)
+
+    it_each(cases.validate.invalid, "$desc", function(tc)
+      local result = smtp.validate(tc.input)
+      expect(result.valid).toBe(false)
+      expect(result.errors[tc.expected_error]).toBeDefined()
+    end)
+  end)
+
+  describe("createDefault", function()
+    it("creates a valid default configuration", function()
+      local config = smtp.createDefault()
+      local validation = smtp.validate(config)
+      -- Default may not be valid (empty username/password) but should have structure
+      expect(config).toBeDefined()
+      expect(config.host).toBeDefined()
+      expect(config.port).toBeDefined()
+    end)
+  end)
+end)
diff --git a/packages/smtp_config/seed/scripts/tests/validate.cases.json b/packages/smtp_config/seed/scripts/tests/validate.cases.json
new file mode 100644
index 000000000..4ee5bafb1
--- /dev/null
+++ b/packages/smtp_config/seed/scripts/tests/validate.cases.json
@@ -0,0 +1,30 @@
+{
+  "validate": [
+    {
+      "desc": "validates complete config",
+      "input": {
+        "host": "smtp.example.com",
+        "port": 587,
+        "username": "user",
+        "password": "pass",
+        "fromEmail": "test@example.com",
+        "fromName": "Test",
+        "secure": true
+      },
+      "expected_valid": true
+    },
+    {
+      "desc": "rejects incomplete config",
+      "input": {
+        "host": "",
+        "port": 587,
+        "username": "",
+        "password": "",
+        "fromEmail": "",
+        "fromName": "",
+        "secure": false
+      },
+      "expected_valid": false
+    }
+  ]
+}
diff --git a/packages/smtp_config/seed/scripts/tests/validate.test.lua b/packages/smtp_config/seed/scripts/tests/validate.test.lua
new file mode 100644
index 000000000..1ddecc9ba
--- /dev/null
+++ b/packages/smtp_config/seed/scripts/tests/validate.test.lua
@@ -0,0 +1,14 @@
+-- Validation module tests
+
+describe("Validate Module", function()
+  local cases = load_cases("validate.cases.json")
+  local validate = require("validate")
+
+  describe("validate", function()
+    it_each(cases.validate, "$desc", function(tc)
+      local result = validate.validate(tc.input)
+      expect(result).toBeDefined()
+      expect(result.valid).toBe(tc.expected_valid)
+    end)
+  end)
+end)