diff --git a/tests/conftest.py b/tests/conftest.py
index d0da68f2..a8c45680 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -19,3 +19,23 @@ def app():
     deps.update(TEST_DEPS)
 
     return make_app(config, deps)
+
+class DummyForm(dict):
+    pass
+
+
+class DummyField(object):
+    def __init__(self, data=None, errors=(), raw_data=None):
+        self.data = data
+        self.errors = list(errors)
+        self.raw_data = raw_data
+
+
+@pytest.fixture
+def dummy_form():
+    return DummyForm()
+
+
+@pytest.fixture
+def dummy_field():
+    return DummyField()
diff --git a/tests/forms/test_validators.py b/tests/forms/test_validators.py
new file mode 100644
index 00000000..b648cc66
--- /dev/null
+++ b/tests/forms/test_validators.py
@@ -0,0 +1,61 @@
+from wtforms.validators import ValidationError
+import pytest
+
+from atst.forms.validators import Alphabet, IsNumber, PhoneNumber
+
+
+class TestIsNumber:
+
+    @pytest.mark.parametrize("valid", ["0", "12", "-12"])
+    def test_IsNumber_accepts_integers(self, valid, dummy_form, dummy_field):
+        validator = IsNumber()
+        dummy_field.data = valid
+        validator(dummy_form, dummy_field)
+
+    @pytest.mark.parametrize("invalid", ["12.1", "two", ""])
+    def test_IsNumber_rejects_anything_else(self, invalid, dummy_form, dummy_field):
+        validator = IsNumber()
+        dummy_field.data = invalid
+        with pytest.raises(ValidationError):
+            validator(dummy_form, dummy_field)
+
+
+class TestPhoneNumber:
+
+    @pytest.mark.parametrize("valid", [
+        "12345",
+        "1234567890",
+        "(123) 456-7890",
+    ])
+    def test_PhoneNumber_accepts_valid_numbers(self, valid, dummy_form, dummy_field):
+        validator = PhoneNumber()
+        dummy_field.data = valid
+        validator(dummy_form, dummy_field)
+
+    @pytest.mark.parametrize("invalid", [
+        "1234",
+        "123456",
+        "1234567abc",
+        "(123) 456-789012",
+    ])
+    def test_PhoneNumber_rejects_invalid_numbers(self, invalid, dummy_form, dummy_field):
+        validator = PhoneNumber()
+        dummy_field.data = invalid
+        with pytest.raises(ValidationError):
+            validator(dummy_form, dummy_field)
+
+
+class TestAlphabet:
+
+    @pytest.mark.parametrize("valid", ["a", "abcde"])
+    def test_Alphabet_accepts_letters(self, valid, dummy_form, dummy_field):
+        validator = Alphabet()
+        dummy_field.data = valid
+        validator(dummy_form, dummy_field)
+
+    @pytest.mark.parametrize("invalid", ["", "hi mark", "cloud9"])
+    def test_Alphabet_rejects_non_letters(self, invalid, dummy_form, dummy_field):
+        validator = Alphabet()
+        dummy_field.data = invalid
+        with pytest.raises(ValidationError):
+            validator(dummy_form, dummy_field)