diff --git a/src/garage/tests/common/custom_requester.rs b/src/garage/tests/common/custom_requester.rs
index 182cd803..42875b51 100644
--- a/src/garage/tests/common/custom_requester.rs
+++ b/src/garage/tests/common/custom_requester.rs
@@ -91,16 +91,32 @@ impl<'a> RequestBuilder<'a> {
 		self
 	}
 
+	pub fn query_param<T, U>(&mut self, param: T, value: Option<U>) -> &mut Self
+	where T: ToString, U: ToString, {
+		self.query_params.insert(param.to_string(), value.as_ref().map(ToString::to_string));
+		self
+	}
+
 	pub fn signed_headers(&mut self, signed_headers: HashMap<String, String>) -> &mut Self {
 		self.signed_headers = signed_headers;
 		self
 	}
 
+	pub fn signed_header(&mut self, name: impl ToString, value: impl ToString) -> &mut Self {
+		self.signed_headers.insert(name.to_string(), value.to_string());
+		self
+	}
+
 	pub fn unsigned_headers(&mut self, unsigned_headers: HashMap<String, String>) -> &mut Self {
 		self.unsigned_headers = unsigned_headers;
 		self
 	}
 
+	pub fn unsigned_header(&mut self, name: impl ToString, value: impl ToString) -> &mut Self {
+		self.unsigned_headers.insert(name.to_string(), value.to_string());
+		self
+	}
+
 	pub fn body(&mut self, body: Vec<u8>) -> &mut Self {
 		self.body = body;
 		self
diff --git a/src/garage/tests/k2v/simple.rs b/src/garage/tests/k2v/simple.rs
index b722e754..164d82aa 100644
--- a/src/garage/tests/k2v/simple.rs
+++ b/src/garage/tests/k2v/simple.rs
@@ -1,4 +1,3 @@
-use std::collections::HashMap;
 use crate::common;
 use common::custom_requester::BodySignature;
 
@@ -9,14 +8,11 @@ async fn test_simple() {
 	let ctx = common::context();
 	let bucket = ctx.create_bucket("test-k2v-simple");
 
-	let mut query_params = HashMap::new();
-	query_params.insert("sort_key".to_string(), Some("test1".to_string()));
-
 	let res = ctx.k2v.request
 		.builder(bucket.clone())
 		.method(Method::PUT)
 		.path("root".into())
-		.query_params(query_params.clone())
+		.query_param("sort_key", Some("test1"))
 		.body(b"Hello, world!".to_vec())
 		.body_signature(BodySignature::Classic)
 		.send()
@@ -24,14 +20,11 @@ async fn test_simple() {
 		.unwrap();
 	assert_eq!(res.status(), 200);
 
-	let mut h = HashMap::new();
-	h.insert("accept".to_string(), "application/octet-stream".to_string());
-
 	let res2 = ctx.k2v.request
 		.builder(bucket.clone())
 		.path("root".into())
-		.query_params(query_params.clone())
-		.signed_headers(h)
+		.query_param("sort_key", Some("test1"))
+		.signed_header("accept", "application/octet-stream")
 		.body_signature(BodySignature::Classic)
 		.send()
 		.await