diff --git a/worker/src/headers.rs b/worker/src/headers.rs
index ea7205df..f2b216fa 100644
--- a/worker/src/headers.rs
+++ b/worker/src/headers.rs
@@ -37,6 +37,11 @@ impl Headers {
         self.0.get(name).map_err(Error::from)
     }
 
+    /// Returns true if the headers object has no entries.
+    pub fn is_empty(&self) -> bool {
+        self.keys().next().is_none()
+    }
+
     /// Returns a boolean stating whether a `Headers` object contains a certain header.
     /// Returns an error if the name is invalid (e.g. contains spaces)
     pub fn has(&self, name: &str) -> Result<bool> {
diff --git a/worker/src/request_init.rs b/worker/src/request_init.rs
index debd098d..5b568499 100644
--- a/worker/src/request_init.rs
+++ b/worker/src/request_init.rs
@@ -66,7 +66,11 @@ impl RequestInit {
 impl From<&RequestInit> for web_sys::RequestInit {
     fn from(req: &RequestInit) -> Self {
         let inner = web_sys::RequestInit::new();
-        inner.set_headers(req.headers.as_ref());
+
+        if !req.headers.is_empty() {
+            inner.set_headers(req.headers.as_ref());
+        }
+
         inner.set_method(req.method.as_ref());
         inner.set_redirect(req.redirect.into());
         if let Some(cache) = req.cache {
@@ -77,16 +81,18 @@ impl From<&RequestInit> for web_sys::RequestInit {
         }
 
         // set the Cloudflare-specific `cf` property on FFI RequestInit
-        let r = ::js_sys::Reflect::set(
-            inner.as_ref(),
-            &JsValue::from("cf"),
-            &JsValue::from(&req.cf),
-        );
-        debug_assert!(
-            r.is_ok(),
-            "setting properties should never fail on our dictionary objects"
-        );
-        let _ = r;
+        if !req.cf.is_default() {
+            let r = ::js_sys::Reflect::set(
+                inner.as_ref(),
+                &JsValue::from("cf"),
+                &JsValue::from(&req.cf),
+            );
+            debug_assert!(
+                r.is_ok(),
+                "setting properties should never fail on our dictionary objects"
+            );
+            let _ = r;
+        }
 
         inner
     }
@@ -278,6 +284,21 @@ impl CfProperties {
     pub fn new() -> Self {
         Default::default()
     }
+
+    pub fn is_default(&self) -> bool {
+        let de = CfProperties::default();
+        self.apps == de.apps
+            && self.cache_everything == de.cache_everything
+            && self.cache_key == de.cache_key
+            && self.cache_ttl == de.cache_ttl
+            && self.cache_ttl_by_status == de.cache_ttl_by_status
+            && self.minify == de.minify
+            && self.mirage == de.mirage
+            && self.image.is_none()
+            && self.polish == de.polish
+            && self.resolve_override == de.resolve_override
+            && self.scrape_shield == de.scrape_shield
+    }
 }
 
 impl Default for CfProperties {
@@ -301,7 +322,7 @@ impl Default for CfProperties {
 /// Configuration options for Cloudflare's minification features:
 /// <https://www.cloudflare.com/website-optimization/>
 #[wasm_bindgen]
-#[derive(Clone, Copy, Debug, Default, Serialize)]
+#[derive(Clone, Copy, Debug, Default, Serialize, PartialEq)]
 #[serde(rename_all = "kebab-case")]
 pub struct MinifyConfig {
     pub js: bool,
@@ -311,7 +332,7 @@ pub struct MinifyConfig {
 
 /// Configuration options for Cloudflare's image optimization feature:
 /// <https://blog.cloudflare.com/introducing-polish-automatic-image-optimizati/>
-#[derive(Clone, Copy, Debug, Default, Serialize)]
+#[derive(Clone, Copy, Debug, Default, Serialize, PartialEq)]
 #[serde(rename_all = "kebab-case")]
 pub enum PolishConfig {
     #[default]
@@ -568,3 +589,13 @@ impl From<CacheMode> for web_sys::RequestCache {
         }
     }
 }
+
+#[test]
+fn request_init_no_invalid_options() {
+    let mut init = RequestInit::new();
+    init.method = Method::Post;
+
+    let js_init: web_sys::RequestInit = (&init).into();
+
+    let _ = web_sys::Request::new_with_str_and_init("https://httpbin.org/post", &js_init).unwrap();
+}