diff --git a/Cargo.lock b/Cargo.lock
index 4dc947bcb..f5fa8a5b4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1993,14 +1993,12 @@ dependencies = [
 
 [[package]]
 name = "mockito"
-version = "0.32.4"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fa08cccbc31b07113e4322d79df4464e0ed888032fc67ec56136325cd3afecf"
+checksum = "8c1eecc3baf782e3c8d6803cc8780268da1f32df6eb88c016c1d80b0df7944cf"
 dependencies = [
  "assert-json-diff",
- "async-trait",
  "colored",
- "deadpool",
  "futures",
  "hyper",
  "lazy_static",
diff --git a/aggregator/Cargo.toml b/aggregator/Cargo.toml
index 67bfbd4fa..4c40a5ef0 100644
--- a/aggregator/Cargo.toml
+++ b/aggregator/Cargo.toml
@@ -92,7 +92,7 @@ hyper = "0.14.25"
 # Kubernetes clusters. Enable the `test-util` feature for various utilities
 # used in unit tests.
 janus_aggregator = { path = ".", features = ["kube-openssl", "test-util"] }
-mockito = "0.32.4"
+mockito = "1.0.0"
 tempfile = "3.4.0"
 tokio = { version = "1", features = ["test-util"] }  # ensure this remains compatible with the non-dev dependency
 trycmd = "0.14.13"
diff --git a/aggregator/src/aggregator.rs b/aggregator/src/aggregator.rs
index 9b885c277..b568b603a 100644
--- a/aggregator/src/aggregator.rs
+++ b/aggregator/src/aggregator.rs
@@ -8191,7 +8191,9 @@ mod tests {
                         .await;
 
                     // Serve the response via mockito, and run it through post_to_helper's error handling.
-                    let mut server = mockito::Server::new_async().await;
+                    // Workaround: use `new_with_port_async` to skip Mockito's server pool, which
+                    // has a bug in 1.0.0.
+                    let mut server = mockito::Server::new_with_port_async(0).await;
                     let error_mock = server
                         .mock("POST", "/")
                         .with_status(response.status().as_u16().into())
diff --git a/client/Cargo.toml b/client/Cargo.toml
index 25168590f..da4458630 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -27,6 +27,6 @@ url = "2.3.1"
 [dev-dependencies]
 assert_matches = "1"
 janus_core = { path = "../core", features = ["test-util"]}
-mockito = "0.32.4"
+mockito = "1.0.0"
 tracing-log = "0.1.3"
 tracing-subscriber = { version = "0.3", features = ["std", "env-filter", "fmt"] }
diff --git a/collector/Cargo.toml b/collector/Cargo.toml
index 38c286c84..f4141565d 100644
--- a/collector/Cargo.toml
+++ b/collector/Cargo.toml
@@ -34,7 +34,7 @@ chrono = "0.4"
 clap = { version = "4.0.27", features = ["derive", "env"] }
 janus_collector = { path = ".", features = ["test-util"] }
 janus_core = { path = "../core", features = ["test-util"] }
-mockito = "0.32.4"
+mockito = "1.0.0"
 rand = "0.8"
 tracing-log = "0.1.3"
 tracing-subscriber = { version = "0.3", features = ["std", "env-filter", "fmt"] }
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 691992766..5321b80f5 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -62,6 +62,6 @@ janus_core = { path = ".", features = ["test-util"] }
 # lack of support for connecting to servers by IP addresses, which affects many
 # Kubernetes clusters.
 kube = { workspace = true, features = ["openssl-tls"] }
-mockito = "0.32.4"
+mockito = "1.0.0"
 serde_test = "1.0.155"
 url = "2.3.1"
diff --git a/core/src/retries.rs b/core/src/retries.rs
index d85387d22..4d06a22ec 100644
--- a/core/src/retries.rs
+++ b/core/src/retries.rs
@@ -44,7 +44,7 @@ pub fn test_http_request_exponential_backoff() -> ExponentialBackoff {
         initial_interval: Duration::from_nanos(1),
         max_interval: Duration::from_nanos(30),
         multiplier: 2.0,
-        max_elapsed_time: Some(Duration::from_millis(10)),
+        max_elapsed_time: Some(Duration::from_millis(100)),
         ..Default::default()
     }
 }