diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
new file mode 100644
index 0000000..76781ef
--- /dev/null
+++ b/.github/workflows/python.yml
@@ -0,0 +1,37 @@
+name: Python
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  pytest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.9
+
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2
+
+      - name: Setup Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          profile: minimal
+
+      - name: Build and install
+        run: |
+          pip install -v ./pyo3-stub-gen-testing[test]
+
+      - name: Python Test
+        run: pytest
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index e26789e..39f2c66 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -92,3 +92,25 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: test
+
+  stub-gen:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: clippy
+
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2
+
+      - name: Generate stub file
+        uses: actions-rs/cargo@v1
+        with:
+          command: run
+          args: --bin stub_gen --features stub_gen
diff --git a/.gitignore b/.gitignore
index 6985cf1..b53f887 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,10 @@ Cargo.lock
 
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
+
+# PyO3 development
+.venv*/
+__pycache__/
+*.so
+*.pyc
+dist/
diff --git a/Cargo.toml b/Cargo.toml
index 5952362..5ea8c31 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,9 @@
 [workspace]
-members = ["pyo3-stub-gen", "pyo3-stub-gen-derive"]
+members = [
+    "pyo3-stub-gen",
+    "pyo3-stub-gen-derive",
+    "pyo3-stub-gen-testing"
+]
 resolver = "2"
 
 [workspace.dependencies]
@@ -12,6 +16,6 @@ inventory = "0.3.14"
 itertools = "0.12.0"
 prettyplease = "0.2.16"
 proc-macro2 = "1.0.74"
-pyo3 = "0.20.1"
+pyo3 = { version = "0.20.1", features = ["experimental-inspect"] }
 quote = "1.0.35"
 syn = "2.0.46"
diff --git a/pyo3-stub-gen-derive/Cargo.toml b/pyo3-stub-gen-derive/Cargo.toml
index 5b10ef4..1228f28 100644
--- a/pyo3-stub-gen-derive/Cargo.toml
+++ b/pyo3-stub-gen-derive/Cargo.toml
@@ -17,4 +17,4 @@ pyo3-stub-gen.workspace = true
 insta.workspace = true
 inventory.workspace = true
 prettyplease.workspace = true
-pyo3 = { workspace = true, features = ["experimental-inspect"] }
+pyo3.workspace = true
diff --git a/pyo3-stub-gen-derive/src/gen_stub.rs b/pyo3-stub-gen-derive/src/gen_stub.rs
index d819716..06d069a 100644
--- a/pyo3-stub-gen-derive/src/gen_stub.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub.rs
@@ -91,7 +91,6 @@ pub fn pyclass(item: TokenStream2) -> Result<TokenStream2> {
     let inner = PyClassInfo::try_from(parse2::<ItemStruct>(item.clone())?)?;
     Ok(quote! {
         #item
-        #[cfg(feature = "gen_stub")]
         inventory::submit! {
             #inner
         }
@@ -102,7 +101,6 @@ pub fn pyclass_enum(item: TokenStream2) -> Result<TokenStream2> {
     let inner = PyEnumInfo::try_from(parse2::<ItemEnum>(item.clone())?)?;
     Ok(quote! {
         #item
-        #[cfg(feature = "gen_stub")]
         inventory::submit! {
             #inner
         }
@@ -113,7 +111,6 @@ pub fn pymethods(item: TokenStream2) -> Result<TokenStream2> {
     let inner = PyMethodsInfo::try_from(parse2::<ItemImpl>(item.clone())?)?;
     Ok(quote! {
         #item
-        #[cfg(feature = "gen_stub")]
         inventory::submit! {
             #inner
         }
@@ -125,7 +122,6 @@ pub fn pyfunction(attr: TokenStream2, item: TokenStream2) -> Result<TokenStream2
     inner.parse_attr(attr)?;
     Ok(quote! {
         #item
-        #[cfg(feature = "gen_stub")]
         inventory::submit! {
             #inner
         }
diff --git a/pyo3-stub-gen-derive/src/gen_stub/arg.rs b/pyo3-stub-gen-derive/src/gen_stub/arg.rs
index 16bbf33..03c2406 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/arg.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/arg.rs
@@ -65,7 +65,7 @@ fn type_to_token(ty: &Type) -> TokenStream2 {
                 // PyO3 reference: https://docs.rs/pyo3/latest/pyo3/pyclass/enum.CompareOp.html
                 // PEP: https://peps.python.org/pep-0207/
                 if last_seg.ident == "CompareOp" {
-                    quote! { crate::stub::compare_op_type_input }
+                    quote! { ::pyo3_stub_gen::type_info::compare_op_type_input }
                 } else {
                     quote! { <#ty as FromPyObject>::type_input }
                 }
@@ -105,7 +105,7 @@ impl ToTokens for ArgInfo {
         let Self { name, r#type: ty } = self;
         let type_tt = type_to_token(ty);
         tokens.append_all(quote! {
-            crate::stub::ArgInfo { name: #name, r#type: #type_tt }
+            ::pyo3_stub_gen::type_info::ArgInfo { name: #name, r#type: #type_tt }
         });
     }
 }
diff --git a/pyo3-stub-gen-derive/src/gen_stub/member.rs b/pyo3-stub-gen-derive/src/gen_stub/member.rs
index 5db9f4d..6f7f628 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/member.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/member.rs
@@ -66,7 +66,7 @@ impl ToTokens for MemberInfo {
         let Self { name, r#type: ty } = self;
         let name = name.strip_prefix("get_").unwrap_or(name);
         tokens.append_all(quote! {
-            crate::stub::MemberInfo {
+            ::pyo3_stub_gen::type_info::MemberInfo {
                 name: #name,
                 r#type: <#ty as IntoPy<PyObject>>::type_output
             }
diff --git a/pyo3-stub-gen-derive/src/gen_stub/method.rs b/pyo3-stub-gen-derive/src/gen_stub/method.rs
index 45901d0..548b5e7 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/method.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/method.rs
@@ -102,10 +102,10 @@ impl ToTokens for MethodInfo {
         let ret_tt = if let Some(ret) = ret {
             quote! { <#ret as IntoPy<::pyo3::PyObject>>::type_output }
         } else {
-            quote! { crate::stub::no_return_type_output }
+            quote! { ::pyo3_stub_gen::type_info::no_return_type_output }
         };
         tokens.append_all(quote! {
-            crate::stub::MethodInfo {
+            ::pyo3_stub_gen::type_info::MethodInfo {
                 name: #name,
                 args: &[ #(#args),* ],
                 r#return: #ret_tt,
diff --git a/pyo3-stub-gen-derive/src/gen_stub/new.rs b/pyo3-stub-gen-derive/src/gen_stub/new.rs
index d136a59..8d01638 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/new.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/new.rs
@@ -41,7 +41,7 @@ impl ToTokens for NewInfo {
         let Self { args, sig } = self;
         let sig_tt = quote_option(sig);
         tokens.append_all(quote! {
-            crate::stub::NewInfo {
+            ::pyo3_stub_gen::type_info::NewInfo {
                 args: &[ #(#args),* ],
                 signature: #sig_tt,
             }
diff --git a/pyo3-stub-gen-derive/src/gen_stub/pyclass.rs b/pyo3-stub-gen-derive/src/gen_stub/pyclass.rs
index 02d5bcc..5f70d02 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/pyclass.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/pyclass.rs
@@ -64,7 +64,7 @@ impl ToTokens for PyClassInfo {
         } = self;
         let module = quote_option(module);
         tokens.append_all(quote! {
-            crate::stub::PyClassInfo {
+            ::pyo3_stub_gen::type_info::PyClassInfo {
                 pyclass_name: #pyclass_name,
                 struct_id: std::any::TypeId::of::<#struct_type>,
                 members: &[ #( #members),* ],
@@ -101,19 +101,19 @@ mod test {
         )?;
         let out = PyClassInfo::try_from(input)?.to_token_stream();
         insta::assert_snapshot!(format_as_value(out), @r###"
-        crate::stub::PyClassInfo {
+        ::pyo3_stub_gen::type_info::PyClassInfo {
             pyclass_name: "Placeholder",
             struct_id: std::any::TypeId::of::<PyPlaceholder>,
             members: &[
-                crate::stub::MemberInfo {
+                ::pyo3_stub_gen::type_info::MemberInfo {
                     name: "name",
                     r#type: <String as IntoPy<PyObject>>::type_output,
                 },
-                crate::stub::MemberInfo {
+                ::pyo3_stub_gen::type_info::MemberInfo {
                     name: "ndim",
                     r#type: <usize as IntoPy<PyObject>>::type_output,
                 },
-                crate::stub::MemberInfo {
+                ::pyo3_stub_gen::type_info::MemberInfo {
                     name: "description",
                     r#type: <Option<String> as IntoPy<PyObject>>::type_output,
                 },
diff --git a/pyo3-stub-gen-derive/src/gen_stub/pyclass_enum.rs b/pyo3-stub-gen-derive/src/gen_stub/pyclass_enum.rs
index d11269a..ec2cdce 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/pyclass_enum.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/pyclass_enum.rs
@@ -67,7 +67,7 @@ impl ToTokens for PyEnumInfo {
         } = self;
         let module = quote_option(module);
         tokens.append_all(quote! {
-            crate::stub::PyEnumInfo {
+            ::pyo3_stub_gen::type_info::PyEnumInfo {
                 pyclass_name: #pyclass_name,
                 enum_id: std::any::TypeId::of::<#enum_type>,
                 variants: &[ #(#variants),* ],
diff --git a/pyo3-stub-gen-derive/src/gen_stub/pyfunction.rs b/pyo3-stub-gen-derive/src/gen_stub/pyfunction.rs
index 179c644..ffbf1fa 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/pyfunction.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/pyfunction.rs
@@ -86,12 +86,12 @@ impl ToTokens for PyFunctionInfo {
         let ret_tt = if let Some(ret) = ret {
             quote! { <#ret as IntoPy<::pyo3::PyObject>>::type_output }
         } else {
-            quote! { crate::stub::no_return_type_output }
+            quote! { ::pyo3_stub_gen::type_info::no_return_type_output }
         };
         let sig_tt = quote_option(sig);
         let module_tt = quote_option(module);
         tokens.append_all(quote! {
-            crate::stub::PyFunctionInfo {
+            ::pyo3_stub_gen::type_info::PyFunctionInfo {
                 name: #name,
                 args: &[ #(#args),* ],
                 r#return: #ret_tt,
diff --git a/pyo3-stub-gen-derive/src/gen_stub/pymethods.rs b/pyo3-stub-gen-derive/src/gen_stub/pymethods.rs
index a26a14b..c35e7cc 100644
--- a/pyo3-stub-gen-derive/src/gen_stub/pymethods.rs
+++ b/pyo3-stub-gen-derive/src/gen_stub/pymethods.rs
@@ -51,7 +51,7 @@ impl ToTokens for PyMethodsInfo {
         } = self;
         let new_tt = quote_option(new);
         tokens.append_all(quote! {
-            crate::stub::PyMethodsInfo {
+            ::pyo3_stub_gen::type_info::PyMethodsInfo {
                 struct_id: std::any::TypeId::of::<#struct_id>,
                 new: #new_tt,
                 getters: &[ #(#getters),* ],
diff --git a/pyo3-stub-gen-testing/Cargo.toml b/pyo3-stub-gen-testing/Cargo.toml
new file mode 100644
index 0000000..ab82c4e
--- /dev/null
+++ b/pyo3-stub-gen-testing/Cargo.toml
@@ -0,0 +1,20 @@
+[package]
+name = "pyo3-stub-gen-testing"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+inventory.workspace = true
+pyo3-stub-gen = { workspace = true, optional = true }
+pyo3.workspace = true
+
+[features]
+stub_gen = ["pyo3-stub-gen"]
+
+[[bin]]
+name = "stub_gen"
+path = "src/bin/stub_gen.rs"
+required-features = ["stub_gen"]
diff --git a/pyo3-stub-gen-testing/pyproject.toml b/pyo3-stub-gen-testing/pyproject.toml
new file mode 100644
index 0000000..87e9626
--- /dev/null
+++ b/pyo3-stub-gen-testing/pyproject.toml
@@ -0,0 +1,10 @@
+[build-system]
+requires = ["maturin>=1.1,<2.0"]
+build-backend = "maturin"
+
+[project]
+name = "pyo3_stub_gen_testing"
+requires-python = ">=3.9"
+
+[project.optional-dependencies]
+test = ["pytest", "pyright"]
diff --git a/pyo3-stub-gen-testing/src/bin/stub_gen.rs b/pyo3-stub-gen-testing/src/bin/stub_gen.rs
new file mode 100644
index 0000000..3e30407
--- /dev/null
+++ b/pyo3-stub-gen-testing/src/bin/stub_gen.rs
@@ -0,0 +1,6 @@
+use pyo3_stub_gen::*;
+
+fn main() {
+    let modules = generate::gather().unwrap();
+    dbg!(modules);
+}
diff --git a/pyo3-stub-gen-testing/src/lib.rs b/pyo3-stub-gen-testing/src/lib.rs
new file mode 100644
index 0000000..fcdea7a
--- /dev/null
+++ b/pyo3-stub-gen-testing/src/lib.rs
@@ -0,0 +1,31 @@
+use pyo3::prelude::*;
+
+#[cfg(feature = "stub_gen")]
+use pyo3_stub_gen::derive::*;
+
+/// Returns the sum of two numbers as a string.
+///
+/// Test of running doc-test
+///
+/// ```rust
+/// assert_eq!(2 + 2, 4);
+/// ```
+#[cfg_attr(feature = "stub_gen", gen_stub_pyfunction)]
+#[pyfunction]
+fn sum_as_string(a: usize, b: usize) -> PyResult<String> {
+    Ok((a + b).to_string())
+}
+
+#[pymodule]
+fn pyo3_stub_gen_testing(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
+    Ok(())
+}
+
+#[cfg(test)]
+mod test {
+    #[test]
+    fn test() {
+        assert_eq!(2 + 2, 4);
+    }
+}
diff --git a/pyo3-stub-gen-testing/tests/test_python.py b/pyo3-stub-gen-testing/tests/test_python.py
new file mode 100644
index 0000000..6674708
--- /dev/null
+++ b/pyo3-stub-gen-testing/tests/test_python.py
@@ -0,0 +1,5 @@
+import pyo3_stub_gen_testing
+
+
+def test_sum_as_string():
+    assert pyo3_stub_gen_testing.sum_as_string(1, 2) == "3"
diff --git a/pyo3-stub-gen/Cargo.toml b/pyo3-stub-gen/Cargo.toml
index 5b7ac23..4f4b261 100644
--- a/pyo3-stub-gen/Cargo.toml
+++ b/pyo3-stub-gen/Cargo.toml
@@ -9,4 +9,4 @@ pyo3-stub-gen-derive.workspace = true
 anyhow.workspace = true
 itertools.workspace = true
 inventory.workspace = true
-pyo3 = { workspace = true, features = ["experimental-inspect"]}
+pyo3.workspace = true
diff --git a/pyo3-stub-gen/src/generate.rs b/pyo3-stub-gen/src/generate.rs
index faf2941..a4c6104 100644
--- a/pyo3-stub-gen/src/generate.rs
+++ b/pyo3-stub-gen/src/generate.rs
@@ -269,7 +269,7 @@ impl fmt::Display for FunctionDef {
 }
 
 #[derive(Debug, Clone, PartialEq, Default)]
-struct Module {
+pub struct Module {
     class: BTreeMap<TypeId, ClassDef>,
     enum_: BTreeMap<TypeId, EnumDef>,
     function: BTreeMap<&'static str, FunctionDef>,
@@ -295,7 +295,7 @@ impl fmt::Display for Module {
 }
 
 /// Gather metadata generated by proc-macros
-fn gather() -> Result<BTreeMap<String, Module>> {
+pub fn gather() -> Result<BTreeMap<String, Module>> {
     let mut modules: BTreeMap<String, Module> = BTreeMap::new();
 
     for info in inventory::iter::<PyClassInfo> {