diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..53eaa21
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..ac40300
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "crates/data/assets/toml-test"]
+	path = crates/data/assets/toml-test
+	url = https://github.com/BurntSushi/toml-test.git
diff --git a/crates/data/Cargo.toml b/crates/data/Cargo.toml
new file mode 100644
index 0000000..850d823
--- /dev/null
+++ b/crates/data/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "toml-test-data"
+version = "1.0.0"
+edition = "2018"
+
+[dependencies]
+include_dir = "0.6"
diff --git a/crates/data/assets/toml-test b/crates/data/assets/toml-test
new file mode 160000
index 0000000..0a2c92b
--- /dev/null
+++ b/crates/data/assets/toml-test
@@ -0,0 +1 @@
+Subproject commit 0a2c92b1664c87cc6895405d5ba2f8892d589c05
diff --git a/crates/data/src/lib.rs b/crates/data/src/lib.rs
new file mode 100644
index 0000000..45bb3c3
--- /dev/null
+++ b/crates/data/src/lib.rs
@@ -0,0 +1,62 @@
+const VALID_DIR: include_dir::Dir = include_dir::include_dir!("assets/toml-test/tests/valid");
+const INVALID_DIR: include_dir::Dir = include_dir::include_dir!("assets/toml-test/tests/invalid");
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub struct Valid<'a> {
+    pub name: &'a str,
+    pub fixture: &'a [u8],
+    pub expected: &'a [u8],
+}
+
+pub fn valid() -> impl Iterator<Item = Valid<'static>> {
+    valid_files(VALID_DIR.files()).chain(VALID_DIR.dirs().iter().flat_map(|d| {
+        assert!(d.dirs().is_empty());
+        valid_files(d.files())
+    }))
+}
+
+fn valid_files(
+    files: &'static [include_dir::File<'static>],
+) -> impl Iterator<Item = Valid<'static>> {
+    files
+        .iter()
+        .filter(|f| f.path().extension().unwrap_or_default() == "toml")
+        .map(move |f| {
+            let t = f;
+            let j = files
+                .iter()
+                .find(|f| {
+                    f.path().parent() == t.path().parent()
+                        && f.path().file_stem() == t.path().file_stem()
+                        && f.path().extension().unwrap() == "json"
+                })
+                .unwrap();
+            let name = t.path().to_str().unwrap();
+            let fixture = t.contents();
+            let expected = j.contents();
+            Valid {
+                name,
+                fixture,
+                expected,
+            }
+        })
+}
+
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+pub struct Invalid<'a> {
+    pub name: &'a str,
+    pub fixture: &'a [u8],
+}
+
+pub fn invalid() -> impl Iterator<Item = Invalid<'static>> {
+    assert!(INVALID_DIR.files().is_empty());
+    INVALID_DIR.dirs().iter().flat_map(|d| {
+        assert!(d.dirs().is_empty());
+        d.files().iter().map(|f| {
+            let t = f;
+            let name = f.path().to_str().unwrap();
+            let fixture = t.contents();
+            Invalid { name, fixture }
+        })
+    })
+}
diff --git a/crates/data/tests/test.rs b/crates/data/tests/test.rs
new file mode 100644
index 0000000..352ef37
--- /dev/null
+++ b/crates/data/tests/test.rs
@@ -0,0 +1,9 @@
+#[test]
+fn valid_doesnt_panic() {
+    toml_test_data::valid().last().unwrap();
+}
+
+#[test]
+fn invalid_doesnt_panic() {
+    toml_test_data::invalid().last().unwrap();
+}