diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0018025e..e29e280b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -259,7 +259,7 @@ jobs:
         with:
           target: aarch64-unknown-linux-gnu
           manylinux: auto
-          args: --release -i python3.9 --no-sdist -m examples/maturin-starter/Cargo.toml
+          args: --release -i python3.9 -m examples/maturin-starter/Cargo.toml
 
       - run: sudo rm -rf examples/maturin-starter/target
         if: ${{ matrix.platform.os == 'ubuntu-latest' && matrix.python-version == '3.9' }}
@@ -271,14 +271,14 @@ jobs:
         with:
           target: x86_64-unknown-linux-gnu
           manylinux: auto
-          args: --release -i python3.9 --no-sdist -m examples/maturin-starter/Cargo.toml
+          args: --release -i python3.9 -m examples/maturin-starter/Cargo.toml
 
       - name: Test cross compilation
         if: ${{ matrix.platform.os == 'macos-latest' && matrix.python-version == '3.9' }}
         uses: messense/maturin-action@v1
         with:
           target: aarch64-apple-darwin
-          args: --release -i python3.9 --no-sdist -m examples/maturin-starter/Cargo.toml
+          args: --release -i python3.9 -m examples/maturin-starter/Cargo.toml
 
       - name: Test cross compile to Windows
         if: ${{ matrix.platform.os == 'ubuntu-latest' && matrix.python-version == '3.8' }}
@@ -301,7 +301,7 @@ jobs:
         uses: messense/maturin-action@v1
         with:
           target: x86_64-pc-windows-gnu
-          args: -i python3.8 --no-sdist -m examples/maturin-starter/Cargo.toml --cargo-extra-args="--features abi3"
+          args: -i python3.8 -m examples/maturin-starter/Cargo.toml --features abi3
 
     env:
       CARGO_TERM_VERBOSE: true
diff --git a/examples/decorator/.template/pyproject.toml b/examples/decorator/.template/pyproject.toml
index 007a5574..cd79e887 100644
--- a/examples/decorator/.template/pyproject.toml
+++ b/examples/decorator/.template/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["maturin>=0.12,<0.13"]
+requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
 
 [project]
diff --git a/examples/decorator/pyproject.toml b/examples/decorator/pyproject.toml
index 3a8fd7e4..c6196256 100644
--- a/examples/decorator/pyproject.toml
+++ b/examples/decorator/pyproject.toml
@@ -1,11 +1,11 @@
 [build-system]
-requires = ["maturin>=0.12,<0.13"]
+requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
 
 [project]
 name = "decorator"
 version = "0.1.0"
-classifier=[
+classifiers = [
     "License :: OSI Approved :: MIT License",
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
diff --git a/examples/maturin-starter/.template/pyproject.toml b/examples/maturin-starter/.template/pyproject.toml
index 007a5574..cd79e887 100644
--- a/examples/maturin-starter/.template/pyproject.toml
+++ b/examples/maturin-starter/.template/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["maturin>=0.12,<0.13"]
+requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
 
 [project]
diff --git a/examples/maturin-starter/pyproject.toml b/examples/maturin-starter/pyproject.toml
index 274cda13..9a18a20e 100644
--- a/examples/maturin-starter/pyproject.toml
+++ b/examples/maturin-starter/pyproject.toml
@@ -1,11 +1,11 @@
 [build-system]
-requires = ["maturin>=0.12,<0.13"]
+requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
 
 [project]
 name = "maturin-starter"
 version = "0.1.0"
-classifier=[
+classifiers = [
     "License :: OSI Approved :: MIT License",
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
diff --git a/examples/word-count/pyproject.toml b/examples/word-count/pyproject.toml
index 9d312b85..d8ce3650 100644
--- a/examples/word-count/pyproject.toml
+++ b/examples/word-count/pyproject.toml
@@ -1,11 +1,11 @@
 [build-system]
-requires = ["maturin>=0.12,<0.13"]
+requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
 
 [project]
 name = "word-count"
 version = "0.1.0"
-classifier=[
+classifiers = [
     "License :: OSI Approved :: MIT License",
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
diff --git a/pytests/Cargo.toml b/pytests/Cargo.toml
index 1e387ca2..6b356342 100644
--- a/pytests/Cargo.toml
+++ b/pytests/Cargo.toml
@@ -14,14 +14,3 @@ pyo3-build-config = { path = "../pyo3-build-config" }
 [lib]
 name = "pyo3_pytests"
 crate-type = ["cdylib"]
-
-[package.metadata.maturin]
-classifier=[
-    "License :: OSI Approved :: MIT License",
-    "Development Status :: 3 - Alpha",
-    "Intended Audience :: Developers",
-    "Programming Language :: Python",
-    "Programming Language :: Rust",
-    "Operating System :: POSIX",
-    "Operating System :: MacOS :: MacOS X",
-]
diff --git a/pytests/pyproject.toml b/pytests/pyproject.toml
index 79ac372f..9d2fb926 100644
--- a/pytests/pyproject.toml
+++ b/pytests/pyproject.toml
@@ -1,6 +1,19 @@
 [build-system]
-requires = ["maturin>=0.12,<0.13"]
+requires = ["maturin>=0.13,<0.14"]
 build-backend = "maturin"
 
 [tool.pytest.ini_options]
 addopts = "--benchmark-disable"
+
+[project]
+name = "pyo3_pytests"
+version = "0.1.0"
+classifiers = [
+    "License :: OSI Approved :: MIT License",
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "Programming Language :: Python",
+    "Programming Language :: Rust",
+    "Operating System :: POSIX",
+    "Operating System :: MacOS :: MacOS X",
+]