diff --git a/crates/cli/src/codegen/dynamic.rs b/crates/cli/src/codegen/dynamic.rs
index c50880b5..6dd56fde 100644
--- a/crates/cli/src/codegen/dynamic.rs
+++ b/crates/cli/src/codegen/dynamic.rs
@@ -304,3 +304,20 @@ fn print_wat(wasm_binary: &[u8]) -> Result<()> {
 fn print_wat(_wasm_binary: &[u8]) -> Result<()> {
     Ok(())
 }
+
+#[cfg(test)]
+mod test {
+    use super::DynamicGenerator;
+    use super::WitOptions;
+    use anyhow::Result;
+
+    #[test]
+    fn default_values() -> Result<()> {
+        let gen = DynamicGenerator::new();
+        assert!(gen.source_compression);
+        assert_eq!(gen.import_namespace, "");
+        assert_eq!(gen.wit_opts, WitOptions::default());
+
+        Ok(())
+    }
+}
diff --git a/crates/cli/src/codegen/static.rs b/crates/cli/src/codegen/static.rs
index 6286a23f..b0bcdb35 100644
--- a/crates/cli/src/codegen/static.rs
+++ b/crates/cli/src/codegen/static.rs
@@ -201,3 +201,20 @@ fn optimize_wasm(wasm: &[u8]) -> Result<Vec<u8>> {
 
     Ok(fs::read(&tempfile_path)?)
 }
+
+#[cfg(test)]
+mod test {
+    use super::StaticGenerator;
+    use super::WitOptions;
+    use anyhow::Result;
+    use javy_config::Config;
+
+    #[test]
+    fn default_values() -> Result<()> {
+        let gen = StaticGenerator::new(Config::default());
+        assert!(gen.source_compression);
+        assert_eq!(gen.wit_opts, WitOptions::default());
+
+        Ok(())
+    }
+}