diff --git a/integration_tests/src/divviup_api_client.rs b/integration_tests/src/divviup_api_client.rs
index cdb323d80..5733a0765 100644
--- a/integration_tests/src/divviup_api_client.rs
+++ b/integration_tests/src/divviup_api_client.rs
@@ -53,7 +53,7 @@ pub struct NewTaskRequest {
     pub max_batch_size: Option<u64>,
     pub expiration: String,
     pub time_precision_seconds: u64,
-    pub hpke_config_id: String,
+    pub collector_credential_id: String,
 }
 
 /// Representation of a DAP task in responses from divviup-api. This application ignores several
@@ -81,18 +81,19 @@ pub struct DivviUpAggregator {
     pub dap_url: Url,
 }
 
-/// Request to create an HPKE config in divviup-api.
+/// Request to create a collector credential in divviup-api.
 #[derive(Serialize)]
-pub struct NewHpkeConfigRequest {
+pub struct NewCollectorCredentialRequest {
     pub name: String,
-    pub contents: String,
+    pub hpke_config: String,
 }
 
-/// Representation of an HPKE config in responses from divviup-api. This application ignores most
-/// fields that we never use.
+/// Representation of a collector credential in responses from divviup-api. This application ignores
+/// most fields that we never use.
 #[derive(Deserialize)]
-pub struct DivviUpHpkeConfig {
+pub struct DivviUpCollectorCredential {
     pub id: String,
+    pub token: String,
 }
 
 /// Representation of a collector auth token in divviup-api.
@@ -189,16 +190,16 @@ impl DivviupApiClient {
         .await
     }
 
-    pub async fn create_hpke_config(
+    pub async fn create_collector_credential(
         &self,
         account: &Account,
-        request: &NewHpkeConfigRequest,
-    ) -> DivviUpHpkeConfig {
+        request: &NewCollectorCredentialRequest,
+    ) -> DivviUpCollectorCredential {
         self.make_request(
             Method::POST,
-            &format!("accounts/{}/hpke_configs", account.id),
+            &format!("accounts/{}/collector_credentials", account.id),
             Some(request),
-            "HPKE config creation",
+            "collector credential creation",
         )
         .await
     }
diff --git a/integration_tests/tests/in_cluster.rs b/integration_tests/tests/in_cluster.rs
index 9c4e35ab1..1e54cd452 100644
--- a/integration_tests/tests/in_cluster.rs
+++ b/integration_tests/tests/in_cluster.rs
@@ -14,7 +14,7 @@ use janus_core::{
 use janus_integration_tests::{
     client::ClientBackend,
     divviup_api_client::{
-        DivviupApiClient, NewAggregatorRequest, NewHpkeConfigRequest, NewTaskRequest,
+        DivviupApiClient, NewAggregatorRequest, NewCollectorCredentialRequest, NewTaskRequest,
     },
     TaskParameters,
 };
@@ -139,12 +139,13 @@ impl InClusterJanusPair {
             )
             .await;
 
-        let collector_hpke_config = divviup_api
-            .create_hpke_config(
+        let collector_credential = divviup_api
+            .create_collector_credential(
                 &account,
-                &NewHpkeConfigRequest {
+                &NewCollectorCredentialRequest {
                     name: "Integration test key".to_string(),
-                    contents: STANDARD.encode(task.collector_hpke_config().unwrap().get_encoded()),
+                    hpke_config: STANDARD
+                        .encode(task.collector_hpke_config().unwrap().get_encoded()),
                 },
             )
             .await;
@@ -161,7 +162,7 @@ impl InClusterJanusPair {
             },
             expiration: "3000-01-01T00:00:00Z".to_owned(),
             time_precision_seconds: task.time_precision().as_seconds(),
-            hpke_config_id: collector_hpke_config.id,
+            collector_credential_id: collector_credential.id,
         };
 
         // Provision the task into both aggregators via divviup-api
@@ -169,6 +170,11 @@ impl InClusterJanusPair {
             .create_task(&account, &provision_task_request)
             .await;
 
+        // Awkwardly, the collector credential we created above will contain a collector auth token
+        // generated by divviup-api, but it's never presented to Janus, so we must ignore it and
+        // instead use the collector auth token that will have been generated by Janus in the
+        // aggregator API and which will be relayed to us in the task creation response. This
+        // awkwardness will go away once we stop supporting Janus 0.5.0 and draft-ietf-ppm-dap-04.
         let collector_auth_tokens = divviup_api
             .list_collector_auth_tokens(&provisioned_task)
             .await;