diff --git a/codex-rs/Cargo.lock b/codex-rs/Cargo.lock
index a21742515f..87818789a8 100644
--- a/codex-rs/Cargo.lock
+++ b/codex-rs/Cargo.lock
@@ -3391,6 +3391,7 @@ dependencies = [
  "codex-protocol",
  "codex-utils-absolute-path",
  "codex-utils-cargo-bin",
+ "codex-utils-rustls-provider",
  "ctor 0.6.3",
  "futures",
  "notify",
diff --git a/codex-rs/core/tests/common/Cargo.toml b/codex-rs/core/tests/common/Cargo.toml
index 660a1568fe..2850dd200f 100644
--- a/codex-rs/core/tests/common/Cargo.toml
+++ b/codex-rs/core/tests/common/Cargo.toml
@@ -24,6 +24,7 @@ codex-models-manager = { workspace = true }
 codex-protocol = { workspace = true }
 codex-utils-absolute-path = { workspace = true }
 codex-utils-cargo-bin = { workspace = true }
+codex-utils-rustls-provider = { workspace = true }
 ctor = { workspace = true }
 futures = { workspace = true }
 notify = { workspace = true }
diff --git a/codex-rs/core/tests/common/responses/realtime_webrtc_server.rs b/codex-rs/core/tests/common/responses/realtime_webrtc_server.rs
index 1d6237b47d..bfae934aa4 100644
--- a/codex-rs/core/tests/common/responses/realtime_webrtc_server.rs
+++ b/codex-rs/core/tests/common/responses/realtime_webrtc_server.rs
@@ -5,6 +5,7 @@ use std::time::Duration;
 
 use base64::Engine;
 use base64::engine::general_purpose::STANDARD as BASE64_STANDARD;
+use codex_utils_rustls_provider::ensure_rustls_crypto_provider;
 use opus_rs::OpusDecoder;
 use serde_json::Value;
 use tokio::io::AsyncReadExt;
@@ -285,6 +286,8 @@ async fn start_session(
 }
 
 async fn create_peer_connection() -> Option<Arc<RTCPeerConnection>> {
+    ensure_rustls_crypto_provider();
+
     let mut media_engine = MediaEngine::default();
     media_engine.register_default_codecs().ok()?;
     let registry = register_default_interceptors(Registry::new(), &mut media_engine).ok()?;
diff --git a/codex-rs/core/tests/suite/realtime_conversation.rs b/codex-rs/core/tests/suite/realtime_conversation.rs
index 69c8d01d59..120185d0a9 100644
--- a/codex-rs/core/tests/suite/realtime_conversation.rs
+++ b/codex-rs/core/tests/suite/realtime_conversation.rs
@@ -267,10 +267,7 @@ async fn conversation_start_audio_text_close_round_trip() -> Result<()> {
         server.handshakes()[1].header("authorization").as_deref(),
         Some("Bearer dummy")
     );
-    assert_eq!(
-        server.handshakes()[1].uri(),
-        "/v1/realtime/calls?intent=quicksilver&model=realtime-test-model"
-    );
+    assert_eq!(server.handshakes()[1].uri(), "/v1/realtime/calls");
     let mut request_types = [
         connection[1].body_json()["type"]
             .as_str()