diff --git a/tests/cpp/gen/ft/buffers.yml b/tests/cpp/gen/ft/buffers.yml
new file mode 100644
index 00000000..4727db59
--- /dev/null
+++ b/tests/cpp/gen/ft/buffers.yml
@@ -0,0 +1,14 @@
+---
+
+classes:
+  Buffers:
+    methods:
+      set_buffer:
+        buffers:
+        - { type: in, src: data, len: len }
+      get_buffer2:
+        buffers:
+        - { type: out, src: data, len: len }
+      get_buffer1:
+        buffers:
+        - { type: out, src: data, len: len }
\ No newline at end of file
diff --git a/tests/cpp/gen/ft/inline_code.yml b/tests/cpp/gen/ft/inline_code.yml
index e78e0271..5b65e848 100644
--- a/tests/cpp/gen/ft/inline_code.yml
+++ b/tests/cpp/gen/ft/inline_code.yml
@@ -2,12 +2,19 @@
 
 classes:
   InlineCode:
+    constants:
+    - NS::inner::KONSTANT
     enums:
       MyE:
         inline_code: |
           .value("Value2", (InlineCode::MyE)2)
     methods:
       get2:
+      cpp_code_with_constant:
+        cpp_code: |
+          [](InlineCode *self) {
+            return KONSTANT;
+          }
     inline_code: |
       // you can even start with a comment
       .def("get4", [](InlineCode *self) {
diff --git a/tests/cpp/gen/ft/virtual_xform.yml b/tests/cpp/gen/ft/virtual_xform.yml
index 0d2a787f..ae6e0b64 100644
--- a/tests/cpp/gen/ft/virtual_xform.yml
+++ b/tests/cpp/gen/ft/virtual_xform.yml
@@ -5,6 +5,11 @@ functions:
 classes:
   VBase:
     methods:
+      different_cpp_and_py:
+        cpp_code: |
+          [](VBase * self, int x) {
+            return x + 2;
+          }
       pure_io:
         param_override:
           ss:
diff --git a/tests/cpp/pyproject.toml.tmpl b/tests/cpp/pyproject.toml.tmpl
index 99f90b27..11c5c818 100644
--- a/tests/cpp/pyproject.toml.tmpl
+++ b/tests/cpp/pyproject.toml.tmpl
@@ -44,6 +44,7 @@ generate = [
     { abstract = "abstract.h" },
     { base_qualname = "base_qualname.h" },
     { base_qualname_hidden = "base_qualname_hidden.h" },
+    { buffers = "buffers.h" },
     { custom_type_caster = "custom_type_caster.h" },
     { defaults = "defaults.h" },
     { docstrings = "docstrings.h" },
@@ -56,6 +57,7 @@ generate = [
     { inline_code = "inline_code.h" },
     { lifetime = "lifetime.h" },
     { nested = "nested.h" },
+    { operators = "operators.h" },
     { overloads = "overloads.h" },
     { parameters = "parameters.h" },
     { refqual = "refqual.h" },
diff --git a/tests/cpp/rpytest/ft/__init__.py b/tests/cpp/rpytest/ft/__init__.py
index f6a6b872..c01766cc 100644
--- a/tests/cpp/rpytest/ft/__init__.py
+++ b/tests/cpp/rpytest/ft/__init__.py
@@ -3,6 +3,7 @@
 # autogenerated by 'robotpy-build create-imports rpytest.ft rpytest.ft._rpytest_ft'
 from ._rpytest_ft import (
     Abstract,
+    Buffers,
     ClassWithFields,
     ClassWithIgnored,
     ClassWithTrampoline,
@@ -19,6 +20,7 @@
     GEnum,
     GEnumMath,
     HasFactory,
+    HasOperator,
     IBase,
     IChild,
     IFinal,
@@ -80,6 +82,7 @@
     VChild,
     VirtualComma,
     checkConvertRpyintToInt,
+    check_different_cpp_and_py,
     check_impure_io,
     check_pure_io,
     convertRpyintToInt,
@@ -107,6 +110,7 @@
 
 __all__ = [
     "Abstract",
+    "Buffers",
     "ClassWithFields",
     "ClassWithIgnored",
     "ClassWithTrampoline",
@@ -123,6 +127,7 @@
     "GEnum",
     "GEnumMath",
     "HasFactory",
+    "HasOperator",
     "IBase",
     "IChild",
     "IFinal",
@@ -184,6 +189,7 @@
     "VChild",
     "VirtualComma",
     "checkConvertRpyintToInt",
+    "check_different_cpp_and_py",
     "check_impure_io",
     "check_pure_io",
     "convertRpyintToInt",
diff --git a/tests/cpp/rpytest/ft/include/buffers.h b/tests/cpp/rpytest/ft/include/buffers.h
new file mode 100644
index 00000000..dc157632
--- /dev/null
+++ b/tests/cpp/rpytest/ft/include/buffers.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <cstring>
+#include <vector>
+
+class Buffers {
+public:
+
+    // in
+    void set_buffer(const uint8_t *data, size_t len) {
+        m_buf.resize(len);
+        memcpy(m_buf.data(), data, len);
+    }
+
+    // out
+    // - data is bytes
+    // - len is input_size and output size
+    void get_buffer2(uint8_t *data, size_t *len) {
+        *len = get_buffer1(data, *len);
+    }
+
+    // out
+    // - data is bytes
+    // - len is input size
+    // - return value is output size
+    size_t get_buffer1(uint8_t *data, size_t len) {
+        size_t rlen = len < m_buf.size() ? len : m_buf.size();
+        if (rlen) {
+            memcpy(data, m_buf.data(), rlen);
+        }
+        return rlen;
+    }
+
+private:
+
+    std::vector<uint8_t> m_buf;
+};
diff --git a/tests/cpp/rpytest/ft/include/inline_code.h b/tests/cpp/rpytest/ft/include/inline_code.h
index af951cfa..ae10a6c4 100644
--- a/tests/cpp/rpytest/ft/include/inline_code.h
+++ b/tests/cpp/rpytest/ft/include/inline_code.h
@@ -1,6 +1,10 @@
 
 #pragma once
 
+namespace NS::inner {
+    static constexpr auto KONSTANT = 4;
+}
+
 class InlineCode {
 public:
     enum MyE {
@@ -8,4 +12,6 @@ class InlineCode {
     };
 
     int get2() const { return 2; }
+
+    int cpp_code_with_constant() { return 3; }
 };
diff --git a/tests/cpp/rpytest/ft/include/operators.h b/tests/cpp/rpytest/ft/include/operators.h
new file mode 100644
index 00000000..a91542f2
--- /dev/null
+++ b/tests/cpp/rpytest/ft/include/operators.h
@@ -0,0 +1,14 @@
+#pragma once
+
+class HasOperator {
+public:
+    HasOperator() : m_i(0) {}
+    HasOperator(int i) : m_i(i) {}
+
+    bool operator==(const HasOperator &o) const {
+        return m_i == o.m_i;
+    }
+
+private:
+    int m_i;
+};
diff --git a/tests/cpp/rpytest/ft/include/overloads.h b/tests/cpp/rpytest/ft/include/overloads.h
index 9bd9e393..fde7d06d 100644
--- a/tests/cpp/rpytest/ft/include/overloads.h
+++ b/tests/cpp/rpytest/ft/include/overloads.h
@@ -29,6 +29,11 @@ struct OverloadedObject
         return o;
     }
 
+    // This shows rtnType is inconsistent in CppHeaderParser
+    const OverloadedObject& overloaded() {
+        return *this;
+    }
+
     constexpr int overloaded_constexpr(int a, int b) {
         return a + b;
     }
diff --git a/tests/cpp/rpytest/ft/include/virtual_comma.h b/tests/cpp/rpytest/ft/include/virtual_comma.h
index 0a149bad..f1898c3a 100644
--- a/tests/cpp/rpytest/ft/include/virtual_comma.h
+++ b/tests/cpp/rpytest/ft/include/virtual_comma.h
@@ -4,10 +4,19 @@
 
 struct VirtualComma
 {
+    struct RVal {};
+
     virtual ~VirtualComma() {}
 
     virtual std::pair<int, int> getTwoTwo()
     {
         return std::pair<int, int>{1, 2};
     }
+
+    // ensures that RVal is recognized as VirtualComma::RVal
+    virtual RVal getRval() {
+        return RVal{};
+    }
+
+    int getRval(int) { return 1; }
 };
\ No newline at end of file
diff --git a/tests/cpp/rpytest/ft/include/virtual_xform.h b/tests/cpp/rpytest/ft/include/virtual_xform.h
index 44a3fb26..72d1c14e 100644
--- a/tests/cpp/rpytest/ft/include/virtual_xform.h
+++ b/tests/cpp/rpytest/ft/include/virtual_xform.h
@@ -5,6 +5,11 @@
 
 struct VBase
 {
+    // overridden in yml but doesn't need vcheck
+    virtual int different_cpp_and_py(int x) {
+        return x + 1;
+    }
+
     virtual void pure_io(std::stringstream &ss) = 0;
     virtual void impure_io(std::stringstream &ss)
     {
@@ -39,3 +44,8 @@ std::string check_impure_io(VBase *base)
     base->impure_io(ss);
     return ss.str();
 }
+
+int check_different_cpp_and_py(VBase *base, int x)
+{
+    return base->different_cpp_and_py(x);
+}
\ No newline at end of file
diff --git a/tests/test_ft_misc.py b/tests/test_ft_misc.py
index 5c4bd6bf..c5d2939c 100644
--- a/tests/test_ft_misc.py
+++ b/tests/test_ft_misc.py
@@ -80,6 +80,26 @@ def test_good_private_abstract():
     assert ft.PrivateAbstract.getPrivateOverride(m) == 0x3
 
 
+#
+# buffers.h
+#
+
+
+def test_buffers():
+    o = ft.Buffers()
+    o.set_buffer(b"12345")
+
+    b = bytearray(4)
+    l = o.get_buffer1(b)
+    assert b == b"1234"
+    assert l == 4
+
+    b = bytearray(4)
+    l = o.get_buffer2(b)
+    assert b == b"1234"
+    assert l == 4
+
+
 #
 # factory.h
 #
@@ -101,6 +121,25 @@ def test_inline_code():
     assert o.get4() == 4
 
 
+def test_cpp_code_with_constant():
+    o = ft.InlineCode()
+    assert o.cpp_code_with_constant() == 4
+
+
+#
+# operators.h
+#
+
+
+def test_operators_eq():
+    o1 = ft.HasOperator(1)
+    o1a = ft.HasOperator(1)
+    o2 = ft.HasOperator(2)
+
+    assert o1 == o1a
+    assert not (o1 == o2)
+
+
 #
 # static_only.h
 #
@@ -136,6 +175,9 @@ def test_virtual_xform():
     assert base.impure_io() == "py vbase impure + c++ vbase impure"
     assert ft.check_impure_io(base) == "c++ vbase impure"
 
+    assert base.different_cpp_and_py(1) == 3
+    assert ft.check_different_cpp_and_py(base, 1) == 2
+
     class PyChild(ft.VBase):
         def pure_io(self) -> str:
             return "pychild pure"