diff --git a/.travis.yml b/.travis.yml
index c2a0230..fac4666 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,23 +10,23 @@ python:
   - "nightly"
 env:
   global:
-    - FLUENT_RUNTIME_DEFAULT_DEPS="fluent.syntax==0.13.0 attrs==19.1.0 babel==2.6.0 pytz==2018.9 six==1.12.0"
+    - FLUENT_RUNTIME_DEFAULT_DEPS="fluent.syntax==0.15 attrs==19.1.0 babel==2.6.0 pytz==2018.9 six==1.12.0"
     - FLUENT_SYNTAX_DEFAULT_DEPS="six"
   matrix:
     - PACKAGE=fluent.syntax
     - PACKAGE=fluent.runtime
 matrix:
   include:
-  - name: "fluent.runtime w/ fluent.syntax==0.10"
+  - name: "fluent.runtime w/ fluent.syntax==0.14"
     python: "3.6"
-    env: PACKAGE=fluent.runtime TEST_DEPS="fluent.syntax==0.10.0 attrs==19.1.0 babel==2.6.0 pytz==2018.9 six==1.12.0"
+    env: PACKAGE=fluent.runtime TEST_DEPS="fluent.syntax==0.14 attrs==19.1.0 babel==2.6.0 pytz==2018.9 six==1.12.0"
   - name: "fluent.runtime with latest everything"
     python: "3.6"
     # These are copy-pasted from setup.py
-    env: PACKAGE=fluent.runtime TEST_DEPS="fluent.syntax>=0.10,<=0.13 attrs babel pytz six"
+    env: PACKAGE=fluent.runtime TEST_DEPS="fluent.syntax>=0.14,<=0.16 attrs babel pytz six"
   allow_failures:
   - python: "3.6"
-    env: PACKAGE=fluent.runtime TEST_DEPS="fluent.syntax>=0.10,<=0.13 attrs babel pytz six"
+    env: PACKAGE=fluent.runtime TEST_DEPS="fluent.syntax>=0.14,<=0.16 attrs babel pytz six"
 
 install:
   - if [ "$PACKAGE" = "fluent.runtime" ]; then TEST_DEPS=${TEST_DEPS:-$FLUENT_RUNTIME_DEFAULT_DEPS}; else TEST_DEPS=${TEST_DEPS:-$FLUENT_SYNTAX_DEFAULT_DEPS}; fi
diff --git a/fluent.runtime/fluent/runtime/resolver.py b/fluent.runtime/fluent/runtime/resolver.py
index 450ca15..3d49747 100644
--- a/fluent.runtime/fluent/runtime/resolver.py
+++ b/fluent.runtime/fluent/runtime/resolver.py
@@ -158,7 +158,7 @@ def __call__(self, env):
 
 class StringLiteral(FTL.StringLiteral, Literal):
     def __call__(self, env):
-        return self.value
+        return self.parse()['value']
 
 
 class NumberLiteral(FTL.NumberLiteral, BaseResolver):
@@ -180,7 +180,14 @@ def __call__(self, env):
 
 class TermReference(FTL.TermReference, BaseResolver):
     def __call__(self, env):
-        with env.modified_for_term_reference():
+        if self.arguments:
+            if self.arguments.positional:
+                env.errors.append(FluentFormatError("Ignored positional arguments passed to term '{0}'"
+                                                    .format(reference_to_id(self))))
+            kwargs = {kwarg.name.name: kwarg.value(env) for kwarg in self.arguments.named}
+        else:
+            kwargs = None
+        with env.modified_for_term_reference(args=kwargs):
             return lookup_reference(self, env)(env)
 
 
@@ -200,9 +207,9 @@ def lookup_reference(ref, env):
     except LookupError:
         env.errors.append(unknown_reference_error_obj(ref_id))
 
-        if isinstance(ref, AttributeExpression):
+        if ref.attribute:
             # Fallback
-            parent_id = reference_to_id(ref.ref)
+            parent_id = reference_to_id(ref, ignore_attributes=True)
             try:
                 return env.context.lookup(parent_id)
             except LookupError:
@@ -231,40 +238,10 @@ def __call__(self, env):
         return FluentNone(name)
 
 
-class AttributeExpression(FTL.AttributeExpression, BaseResolver):
-    def __call__(self, env):
-        return lookup_reference(self, env)(env)
-
-
 class Attribute(FTL.Attribute, BaseResolver):
     pass
 
 
-class VariantList(FTL.VariantList, BaseResolver):
-    def __call__(self, env, key=None):
-        found = None
-        for variant in self.variants:
-            if variant.default:
-                default = variant
-                if key is None:
-                    # We only want the default
-                    break
-
-            compare_value = variant.key(env)
-            if match(key, compare_value, env):
-                found = variant
-                break
-
-        if found is None:
-            if (key is not None and not isinstance(key, FluentNone)):
-                env.errors.append(FluentReferenceError("Unknown variant: {0}"
-                                                       .format(key)))
-            found = default
-        assert found, "Not having a default variant is a parse error"
-
-        return found.value(env)
-
-
 class SelectExpression(FTL.SelectExpression, BaseResolver):
     def __call__(self, env):
         key = self.selector(env)
@@ -314,33 +291,15 @@ def __call__(self, env):
         return self.name
 
 
-class VariantExpression(FTL.VariantExpression, BaseResolver):
-    def __call__(self, env):
-        message = lookup_reference(self.ref, env)
-
-        # TODO What to do if message is not a VariantList?
-        # Need test at least.
-        assert isinstance(message, VariantList)
-
-        variant_name = self.key.name
-        return message(env, variant_name)
+class CallArguments(FTL.CallArguments, BaseResolver):
+    pass
 
 
-class CallExpression(FTL.CallExpression, BaseResolver):
+class FunctionReference(FTL.FunctionReference, BaseResolver):
     def __call__(self, env):
-        args = [arg(env) for arg in self.positional]
-        kwargs = {kwarg.name.name: kwarg.value(env) for kwarg in self.named}
-
-        if isinstance(self.callee, (TermReference, AttributeExpression)):
-            term = lookup_reference(self.callee, env)
-            if args:
-                env.errors.append(FluentFormatError("Ignored positional arguments passed to term '{0}'"
-                                                    .format(reference_to_id(self.callee))))
-            with env.modified_for_term_reference(args=kwargs):
-                return term(env)
-
-        # builtin or custom function call
-        function_name = self.callee.id.name
+        args = [arg(env) for arg in self.arguments.positional]
+        kwargs = {kwarg.name.name: kwarg.value(env) for kwarg in self.arguments.named}
+        function_name = self.id.name
         try:
             function = env.context._functions[function_name]
         except LookupError:
diff --git a/fluent.runtime/fluent/runtime/utils.py b/fluent.runtime/fluent/runtime/utils.py
index 47a67fd..435c31a 100644
--- a/fluent.runtime/fluent/runtime/utils.py
+++ b/fluent.runtime/fluent/runtime/utils.py
@@ -3,7 +3,7 @@
 from datetime import date, datetime
 from decimal import Decimal
 
-from fluent.syntax.ast import AttributeExpression, Term, TermReference
+from fluent.syntax.ast import Term, TermReference
 
 from .types import FluentInt, FluentFloat, FluentDecimal, FluentDate, FluentDateTime
 from .errors import FluentReferenceError
@@ -39,9 +39,9 @@ def native_to_fluent(val):
     return val
 
 
-def reference_to_id(ref):
+def reference_to_id(ref, ignore_attributes=False):
     """
-    Returns a string reference for a MessageReference, TermReference or AttributeExpression
+    Returns a string reference for a MessageReference or TermReference
     AST node.
 
     e.g.
@@ -50,12 +50,14 @@ def reference_to_id(ref):
        -term
        -term.attr
     """
-    if isinstance(ref, AttributeExpression):
-        return _make_attr_id(reference_to_id(ref.ref),
-                             ref.name.name)
     if isinstance(ref, TermReference):
-        return TERM_SIGIL + ref.id.name
-    return ref.id.name
+        start = TERM_SIGIL + ref.id.name
+    else:
+        start = ref.id.name
+
+    if not ignore_attributes and ref.attribute:
+        return ''.join([start, ATTRIBUTE_SEPARATOR, ref.attribute.name])
+    return start
 
 
 def unknown_reference_error_obj(ref_id):
@@ -64,10 +66,3 @@ def unknown_reference_error_obj(ref_id):
     if ref_id.startswith(TERM_SIGIL):
         return FluentReferenceError("Unknown term: {0}".format(ref_id))
     return FluentReferenceError("Unknown message: {0}".format(ref_id))
-
-
-def _make_attr_id(parent_ref_id, attr_name):
-    """
-    Given a parent id and the attribute name, return the attribute id
-    """
-    return ''.join([parent_ref_id, ATTRIBUTE_SEPARATOR, attr_name])
diff --git a/fluent.runtime/setup.py b/fluent.runtime/setup.py
index 14b1f21..21324f1 100755
--- a/fluent.runtime/setup.py
+++ b/fluent.runtime/setup.py
@@ -21,7 +21,7 @@
       packages=['fluent', 'fluent.runtime'],
       # These should also be duplicated in tox.ini and ../.travis.yml
       install_requires=[
-          'fluent.syntax>=0.10,<=0.13',
+          'fluent.syntax>=0.14,<=0.16',
           'attrs',
           'babel',
           'pytz',
diff --git a/fluent.runtime/tests/format/test_placeables.py b/fluent.runtime/tests/format/test_placeables.py
index aa26197..963b386 100644
--- a/fluent.runtime/tests/format/test_placeables.py
+++ b/fluent.runtime/tests/format/test_placeables.py
@@ -24,7 +24,6 @@ def setUp(self):
             uses-message = { message }
             uses-message-attr = { message.attr }
             uses-term = { -term }
-            uses-term-variant = { -term2[variant2] }
 
             bad-message-ref = Text { not-a-message }
             bad-message-attr-ref = Text { message.not-an-attr }
@@ -57,11 +56,6 @@ def test_placeable_term(self):
         self.assertEqual(val, 'Term')
         self.assertEqual(len(errs), 0)
 
-    def test_placeable_term_variant(self):
-        val, errs = self.ctx.format('uses-term-variant', {})
-        self.assertEqual(val, 'Term Variant 2')
-        self.assertEqual(len(errs), 0)
-
     def test_placeable_bad_message(self):
         val, errs = self.ctx.format('bad-message-ref', {})
         self.assertEqual(val, 'Text not-a-message')
diff --git a/fluent.runtime/tests/format/test_primitives.py b/fluent.runtime/tests/format/test_primitives.py
index 01e86cb..bdc1f66 100644
--- a/fluent.runtime/tests/format/test_primitives.py
+++ b/fluent.runtime/tests/format/test_primitives.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 from __future__ import absolute_import, unicode_literals
 
 import unittest
@@ -10,7 +11,7 @@
 class TestSimpleStringValue(unittest.TestCase):
     def setUp(self):
         self.ctx = FluentBundle(['en-US'], use_isolating=False)
-        self.ctx.add_messages(dedent_ftl("""
+        self.ctx.add_messages(dedent_ftl(r"""
             foo               = Foo
             placeable-literal = { "Foo" } Bar
             placeable-message = { foo } Bar
@@ -27,6 +28,7 @@ def setUp(self):
                 [BazAttribute] Member 3
                *[other]        Member 4
              }
+            escapes = {"    "}stuff{"\u0258}\"\\end"}
         """))
 
     def test_can_be_used_as_a_value(self):
@@ -64,6 +66,11 @@ def test_can_be_a_value_of_an_attribute_used_as_a_selector(self):
         self.assertEqual(val, 'Member 3')
         self.assertEqual(len(errs), 0)
 
+    def test_escapes(self):
+        val, errs = self.ctx.format('escapes', {})
+        self.assertEqual(val, r'    stuffɘ}"\end')
+        self.assertEqual(len(errs), 0)
+
 
 class TestComplexStringValue(unittest.TestCase):
     def setUp(self):
diff --git a/fluent.runtime/tests/format/test_variants.py b/fluent.runtime/tests/format/test_variants.py
deleted file mode 100644
index 01fdb6c..0000000
--- a/fluent.runtime/tests/format/test_variants.py
+++ /dev/null
@@ -1,47 +0,0 @@
-from __future__ import absolute_import, unicode_literals
-
-import unittest
-
-from fluent.runtime import FluentBundle
-from fluent.runtime.errors import FluentReferenceError
-
-from ..utils import dedent_ftl
-
-
-class TestVariants(unittest.TestCase):
-
-    def setUp(self):
-        self.ctx = FluentBundle(['en-US'], use_isolating=False)
-        self.ctx.add_messages(dedent_ftl("""
-            -variant = {
-                [a] A
-               *[b] B
-             }
-            foo = { -variant }
-            bar = { -variant[a] }
-            baz = { -variant[b] }
-            qux = { -variant[c] }
-        """))
-
-    def test_returns_the_default_variant(self):
-        val, errs = self.ctx.format('foo', {})
-        self.assertEqual(val, 'B')
-        self.assertEqual(len(errs), 0)
-
-    def test_choose_other_variant(self):
-        val, errs = self.ctx.format('bar', {})
-        self.assertEqual(val, 'A')
-        self.assertEqual(len(errs), 0)
-
-    def test_choose_default_variant(self):
-        val, errs = self.ctx.format('baz', {})
-        self.assertEqual(val, 'B')
-        self.assertEqual(len(errs), 0)
-
-    def test_choose_missing_variant(self):
-        val, errs = self.ctx.format('qux', {})
-        self.assertEqual(val, 'B')
-        self.assertEqual(len(errs), 1)
-        self.assertEqual(
-            errs,
-            [FluentReferenceError("Unknown variant: c")])
diff --git a/fluent.runtime/tox.ini b/fluent.runtime/tox.ini
index d1d5c04..5d2553b 100644
--- a/fluent.runtime/tox.ini
+++ b/fluent.runtime/tox.ini
@@ -1,14 +1,14 @@
 # This config is for local testing. It should be duplicated into .travis.yml
 [tox]
-envlist = {py27,py35,py36,py37,pypy,pypy3}-syntax0.13, py36-syntax0.10, latest
+envlist = {py27,py35,py36,py37,pypy,pypy3}-syntax0.15, py36-syntax0.14, latest
 skipsdist=True
 
 [testenv]
 setenv =
     PYTHONPATH = {toxinidir}
 deps =
-     syntax0.10: fluent.syntax==0.10.0
-     syntax0.13: fluent.syntax==0.13.0
+     syntax0.15: fluent.syntax==0.15
+     syntax0.14: fluent.syntax==0.14
      attrs==19.1.0
      babel==2.6.0
      pytz==2018.9
@@ -22,7 +22,7 @@ deps =
      # It's tempting to use '.' here to get 'pip install .'
      # Unfortunately it is super slow: https://github.com/pypa/pip/issues/2195
      # Instead we copy-paste from setup.py
-     fluent.syntax>=0.10,<=0.13
+     fluent.syntax>=0.14,<=0.16
      attrs
      babel
      pytz