diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index d52bf7ba047..0b385fef10f 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -10,6 +10,7 @@ use crate::{
 
 use crate::tests::util::github::next_gh_id;
 use diesel::prelude::*;
+use diesel_async::{AsyncPgConnection, RunQueryDsl};
 
 mod account_lock;
 mod authentication;
@@ -111,11 +112,11 @@ fn new_team(login: &str) -> NewTeam<'_> {
         .build()
 }
 
-pub fn add_team_to_crate(
+pub async fn add_team_to_crate(
     t: &Team,
     krate: &Crate,
     u: &User,
-    conn: &mut PgConnection,
+    conn: &mut AsyncPgConnection,
 ) -> QueryResult<()> {
     let crate_owner = CrateOwner {
         crate_id: krate.id,
@@ -130,7 +131,8 @@ pub fn add_team_to_crate(
         .on_conflict(crate_owners::table.primary_key())
         .do_update()
         .set(crate_owners::deleted.eq(false))
-        .execute(conn)?;
+        .execute(conn)
+        .await?;
 
     Ok(())
 }
diff --git a/src/tests/owners.rs b/src/tests/owners.rs
index 68360b5f941..8cbbdb43d5b 100644
--- a/src/tests/owners.rs
+++ b/src/tests/owners.rs
@@ -279,11 +279,14 @@ async fn modify_multiple_owners() {
 async fn check_ownership_two_crates() {
     let (app, anon, user) = TestApp::init().with_user().await;
     let mut conn = app.db_conn();
+    let mut async_conn = app.async_db_conn().await;
     let user = user.as_model();
 
     let team = new_team("team_foo").create_or_update(&mut conn).unwrap();
     let krate_owned_by_team = CrateBuilder::new("foo", user.id).expect_build(&mut conn);
-    add_team_to_crate(&team, &krate_owned_by_team, user, &mut conn).unwrap();
+    add_team_to_crate(&team, &krate_owned_by_team, user, &mut async_conn)
+        .await
+        .unwrap();
 
     let user2 = app.db_new_user("user_bar").await;
     let user2 = user2.as_model();
@@ -310,13 +313,16 @@ async fn check_ownership_two_crates() {
 async fn check_ownership_one_crate() {
     let (app, anon, user) = TestApp::init().with_user().await;
     let mut conn = app.db_conn();
+    let mut async_conn = app.async_db_conn().await;
     let user = user.as_model();
 
     let team = new_team("github:test_org:team_sloth")
         .create_or_update(&mut conn)
         .unwrap();
     let krate = CrateBuilder::new("best_crate", user.id).expect_build(&mut conn);
-    add_team_to_crate(&team, &krate, user, &mut conn).unwrap();
+    add_team_to_crate(&team, &krate, user, &mut async_conn)
+        .await
+        .unwrap();
 
     let json: TeamResponse = anon
         .get("/api/v1/crates/best_crate/owner_team")
@@ -339,13 +345,16 @@ async fn check_ownership_one_crate() {
 async fn add_existing_team() {
     let (app, _, user, token) = TestApp::init().with_token().await;
     let mut conn = app.db_conn();
+    let mut async_conn = app.async_db_conn().await;
     let user = user.as_model();
 
     let t = new_team("github:test_org:bananas")
         .create_or_update(&mut conn)
         .unwrap();
     let krate = CrateBuilder::new("best_crate", user.id).expect_build(&mut conn);
-    add_team_to_crate(&t, &krate, user, &mut conn).unwrap();
+    add_team_to_crate(&t, &krate, user, &mut async_conn)
+        .await
+        .unwrap();
 
     let ret = token
         .add_named_owner("best_crate", "github:test_org:bananas")
diff --git a/src/tests/team.rs b/src/tests/team.rs
index 890bdebde4e..913c633a2db 100644
--- a/src/tests/team.rs
+++ b/src/tests/team.rs
@@ -419,13 +419,16 @@ async fn add_owners_as_team_owner() {
 async fn crates_by_team_id() {
     let (app, anon, user) = TestApp::init().with_user().await;
     let mut conn = app.db_conn();
+    let mut async_conn = app.async_db_conn().await;
     let user = user.as_model();
 
     let t = new_team("github:test-org:team")
         .create_or_update(&mut conn)
         .unwrap();
     let krate = CrateBuilder::new("foo", user.id).expect_build(&mut conn);
-    add_team_to_crate(&t, &krate, user, &mut conn).unwrap();
+    add_team_to_crate(&t, &krate, user, &mut async_conn)
+        .await
+        .unwrap();
 
     let json = anon.search(&format!("team_id={}", t.id)).await;
     assert_eq!(json.crates.len(), 1);
@@ -435,6 +438,7 @@ async fn crates_by_team_id() {
 async fn crates_by_team_id_not_including_deleted_owners() {
     let (app, anon) = TestApp::init().empty().await;
     let mut conn = app.db_conn();
+    let mut async_conn = app.async_db_conn().await;
     let user = app.db_new_user("user-all-teams").await;
     let user = user.as_model();
 
@@ -447,7 +451,9 @@ async fn crates_by_team_id_not_including_deleted_owners() {
     let t = new_team.create_or_update(&mut conn).unwrap();
 
     let krate = CrateBuilder::new("foo", user.id).expect_build(&mut conn);
-    add_team_to_crate(&t, &krate, user, &mut conn).unwrap();
+    add_team_to_crate(&t, &krate, user, &mut async_conn)
+        .await
+        .unwrap();
     krate.owner_remove(&mut conn, &t.login).unwrap();
 
     let json = anon.search(&format!("team_id={}", t.id)).await;
diff --git a/src/typosquat/database.rs b/src/typosquat/database.rs
index 651febd512e..721e7dea9fb 100644
--- a/src/typosquat/database.rs
+++ b/src/typosquat/database.rs
@@ -183,6 +183,7 @@ mod tests {
     async fn top_crates() -> Result<(), Error> {
         let test_db = TestDatabase::new();
         let mut conn = test_db.connect();
+        let mut async_conn = test_db.async_connect().await;
 
         // Set up two users.
         let user_a = faker::user(&mut conn, "a")?;
@@ -195,10 +196,9 @@ mod tests {
 
         // Let's set up a team that owns both b and c, but not a.
         let not_the_a_team = faker::team(&mut conn, "org", "team")?;
-        add_team_to_crate(&not_the_a_team, &top_b, &user_b, &mut conn)?;
-        add_team_to_crate(&not_the_a_team, &not_top_c, &user_b, &mut conn)?;
+        add_team_to_crate(&not_the_a_team, &top_b, &user_b, &mut async_conn).await?;
+        add_team_to_crate(&not_the_a_team, &not_top_c, &user_b, &mut async_conn).await?;
 
-        let mut async_conn = test_db.async_connect().await;
         let top_crates = TopCrates::new(&mut async_conn, 2).await?;
 
         // Let's ensure the top crates include what we expect (which is a and b, since we asked for