diff --git a/Cargo.toml b/Cargo.toml
index 42667b4..93961c8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ tokio-io = "0.1.4"
 bytes = "0.4"
 http = "0.1"
 byteorder = "1.0"
-log = "0.3.8"
+log = "0.4.1"
 fnv = "1.0.5"
 slab = "0.4.0"
 string = "0.1"
@@ -41,7 +41,7 @@ ordermap = "0.2"
 tokio-timer = "0.1"
 
 # Fuzzing
-quickcheck = "0.4.1"
+quickcheck = { version = "0.4.1", default-features = false }
 rand = "0.3.15"
 
 # HPACK fixtures
@@ -52,7 +52,7 @@ serde_json = "1.0.0"
 
 # Akamai example
 tokio-core = "0.1"
-env_logger = "0.4.3"
+env_logger = { version = "0.5.3", default-features = false }
 rustls = "0.12"
 tokio-rustls = "0.5.0"
 webpki = "0.18.0-alpha"
diff --git a/examples/akamai.rs b/examples/akamai.rs
index e14cc39..9ffef7e 100644
--- a/examples/akamai.rs
+++ b/examples/akamai.rs
@@ -25,7 +25,7 @@ use std::net::ToSocketAddrs;
 const ALPN_H2: &str = "h2";
 
 pub fn main() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let tls_client_config = std::sync::Arc::new({
         let mut c = rustls::ClientConfig::new();
diff --git a/examples/client.rs b/examples/client.rs
index b7ad921..8a0d03a 100644
--- a/examples/client.rs
+++ b/examples/client.rs
@@ -45,7 +45,7 @@ impl Future for Process {
 }
 
 pub fn main() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mut core = reactor::Core::new().unwrap();
     let handle = core.handle();
diff --git a/examples/server.rs b/examples/server.rs
index 7919854..6167e5e 100644
--- a/examples/server.rs
+++ b/examples/server.rs
@@ -15,7 +15,7 @@ use tokio_core::net::TcpListener;
 use tokio_core::reactor;
 
 pub fn main() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mut core = reactor::Core::new().unwrap();
     let handle = core.handle();
diff --git a/tests/client_request.rs b/tests/client_request.rs
index 749d1cb..4824de8 100644
--- a/tests/client_request.rs
+++ b/tests/client_request.rs
@@ -6,7 +6,7 @@ use support::prelude::*;
 
 #[test]
 fn handshake() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
@@ -23,7 +23,7 @@ fn handshake() {
 
 #[test]
 fn client_other_thread() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -60,7 +60,7 @@ fn client_other_thread() {
 
 #[test]
 fn recv_invalid_server_stream_id() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
@@ -96,7 +96,7 @@ fn recv_invalid_server_stream_id() {
 
 #[test]
 fn request_stream_id_overflows() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
 
@@ -159,7 +159,7 @@ fn request_stream_id_overflows() {
 
 #[test]
 fn client_builder_max_concurrent_streams() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let mut settings = frame::Settings::default();
@@ -199,7 +199,7 @@ fn client_builder_max_concurrent_streams() {
 
 #[test]
 fn request_over_max_concurrent_streams_errors() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
 
@@ -284,7 +284,7 @@ fn request_over_max_concurrent_streams_errors() {
 
 #[test]
 fn http_11_request_without_scheme_or_authority() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -321,7 +321,7 @@ fn http_11_request_without_scheme_or_authority() {
 
 #[test]
 fn http_2_request_without_scheme_or_authority() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -359,7 +359,7 @@ fn request_with_h1_version() {}
 
 #[test]
 fn request_with_connection_headers() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -397,7 +397,7 @@ fn request_with_connection_headers() {
 
 #[test]
 fn connection_close_notifies_response_future() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -440,7 +440,7 @@ fn connection_close_notifies_response_future() {
 
 #[test]
 fn connection_close_notifies_client_poll_ready() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -490,7 +490,7 @@ fn connection_close_notifies_client_poll_ready() {
 
 #[test]
 fn sending_request_on_closed_connection() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -555,7 +555,7 @@ fn sending_request_on_closed_connection() {
 
 #[test]
 fn recv_too_big_headers() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
diff --git a/tests/codec_read.rs b/tests/codec_read.rs
index 72e97dc..1c2658e 100644
--- a/tests/codec_read.rs
+++ b/tests/codec_read.rs
@@ -114,7 +114,7 @@ fn read_headers_empty_payload() {}
 
 #[test]
 fn read_continuation_frames() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let large = build_large_headers();
@@ -170,7 +170,7 @@ fn read_continuation_frames() {
 
 #[test]
 fn update_max_frame_len_at_rest() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     // TODO: add test for updating max frame length in flight as well?
     let mut codec = raw_codec! {
         read => [
diff --git a/tests/codec_write.rs b/tests/codec_write.rs
index 507d91a..71e7807 100644
--- a/tests/codec_write.rs
+++ b/tests/codec_write.rs
@@ -6,7 +6,7 @@ use support::prelude::*;
 fn write_continuation_frames() {
     // An invalid dependency ID results in a stream level error. The hpack
     // payload should still be decoded.
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let large = build_large_headers();
diff --git a/tests/flow_control.rs b/tests/flow_control.rs
index fe975fb..178f37f 100644
--- a/tests/flow_control.rs
+++ b/tests/flow_control.rs
@@ -6,7 +6,7 @@ use support::prelude::*;
 // explicitly requested.
 #[test]
 fn send_data_without_requesting_capacity() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = [0; 1024];
 
@@ -52,7 +52,7 @@ fn send_data_without_requesting_capacity() {
 
 #[test]
 fn release_capacity_sends_window_update() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = vec![0u8; 16_384];
 
@@ -126,7 +126,7 @@ fn release_capacity_sends_window_update() {
 
 #[test]
 fn release_capacity_of_small_amount_does_not_send_window_update() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = [0; 16];
 
@@ -190,7 +190,7 @@ fn expand_window_calls_are_coalesced() {}
 
 #[test]
 fn recv_data_overflows_connection_window() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let (io, srv) = mock::new();
 
@@ -257,7 +257,7 @@ fn recv_data_overflows_connection_window() {
 #[test]
 fn recv_data_overflows_stream_window() {
     // this tests for when streams have smaller windows than their connection
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let (io, srv) = mock::new();
 
@@ -324,7 +324,7 @@ fn recv_window_update_causes_overflow() {
 
 #[test]
 fn stream_error_release_connection_capacity() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -395,7 +395,7 @@ fn stream_error_release_connection_capacity() {
 
 #[test]
 fn stream_close_by_data_frame_releases_capacity() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let window_size = frame::DEFAULT_INITIAL_WINDOW_SIZE as usize;
@@ -466,7 +466,7 @@ fn stream_close_by_data_frame_releases_capacity() {
 
 #[test]
 fn stream_close_by_trailers_frame_releases_capacity() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let window_size = frame::DEFAULT_INITIAL_WINDOW_SIZE as usize;
@@ -551,7 +551,7 @@ fn stream_close_by_recv_reset_frame_releases_capacity() {}
 
 #[test]
 fn recv_window_update_on_stream_closed_by_data_frame() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let h2 = client::handshake(io)
@@ -600,7 +600,7 @@ fn recv_window_update_on_stream_closed_by_data_frame() {
 
 #[test]
 fn reserved_capacity_assigned_in_multi_window_updates() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let h2 = client::handshake(io)
@@ -685,7 +685,7 @@ fn connection_notified_on_released_capacity() {
     use std::sync::mpsc;
     use std::thread;
 
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     // We're going to run the connection on a thread in order to isolate task
@@ -788,7 +788,7 @@ fn connection_notified_on_released_capacity() {
 
 #[test]
 fn recv_settings_removes_available_capacity() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let mut settings = frame::Settings::default();
@@ -846,7 +846,7 @@ fn recv_settings_removes_available_capacity() {
 
 #[test]
 fn recv_no_init_window_then_receive_some_init_window() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let mut settings = frame::Settings::default();
@@ -911,7 +911,7 @@ fn settings_lowered_capacity_returns_capacity_to_connection() {
     use std::sync::mpsc;
     use std::thread;
 
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
     let (tx1, rx1) = mpsc::channel();
     let (tx2, rx2) = mpsc::channel();
@@ -1029,7 +1029,7 @@ fn settings_lowered_capacity_returns_capacity_to_connection() {
 
 #[test]
 fn client_increase_target_window_size() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -1051,7 +1051,7 @@ fn client_increase_target_window_size() {
 
 #[test]
 fn increase_target_window_size_after_using_some() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -1091,7 +1091,7 @@ fn increase_target_window_size_after_using_some() {
 
 #[test]
 fn decrease_target_window_size() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -1139,7 +1139,7 @@ fn decrease_target_window_size() {
 
 #[test]
 fn server_target_window_size() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client.assert_server_handshake()
@@ -1161,7 +1161,7 @@ fn server_target_window_size() {
 #[test]
 fn recv_settings_increase_window_size_after_using_some() {
     // See https://github.com/carllerche/h2/issues/208
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let new_win_size = 16_384 * 4; // 1 bigger than default
diff --git a/tests/ping_pong.rs b/tests/ping_pong.rs
index fe4e3c4..d77a869 100644
--- a/tests/ping_pong.rs
+++ b/tests/ping_pong.rs
@@ -4,7 +4,7 @@ use support::prelude::*;
 
 #[test]
 fn recv_single_ping() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (m, mock) = mock::new();
 
     // Create the handshake
@@ -40,7 +40,7 @@ fn recv_single_ping() {
 
 #[test]
 fn recv_multiple_pings() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client.assert_server_handshake()
@@ -64,7 +64,7 @@ fn recv_multiple_pings() {
 
 #[test]
 fn pong_has_highest_priority() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let data = Bytes::from(vec![0; 16_384]);
diff --git a/tests/prioritization.rs b/tests/prioritization.rs
index fd9a3d6..2698317 100644
--- a/tests/prioritization.rs
+++ b/tests/prioritization.rs
@@ -4,7 +4,7 @@ use support::prelude::*;
 
 #[test]
 fn single_stream_send_large_body() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = [0; 1024];
 
@@ -67,7 +67,7 @@ fn single_stream_send_large_body() {
 
 #[test]
 fn single_stream_send_extra_large_body_multi_frames_one_buffer() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = vec![0; 32_768];
 
@@ -134,7 +134,7 @@ fn single_stream_send_extra_large_body_multi_frames_one_buffer() {
 
 #[test]
 fn single_stream_send_body_greater_than_default_window() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = vec![0; 16384*5-1];
 
@@ -227,7 +227,7 @@ fn single_stream_send_body_greater_than_default_window() {
 
 #[test]
 fn single_stream_send_extra_large_body_multi_frames_multi_buffer() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let payload = vec![0; 32_768];
 
@@ -293,7 +293,7 @@ fn single_stream_send_extra_large_body_multi_frames_multi_buffer() {
 
 #[test]
 fn send_data_receive_window_update() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (m, mock) = mock::new();
 
     let h2 = client::handshake(m)
diff --git a/tests/push_promise.rs b/tests/push_promise.rs
index c133dab..6f4561c 100644
--- a/tests/push_promise.rs
+++ b/tests/push_promise.rs
@@ -5,7 +5,7 @@ use support::prelude::*;
 fn recv_push_works() {
     // tests that by default, received push promises work
     // TODO: once API exists, read the pushed response
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let (io, srv) = mock::new();
     let mock = srv.assert_client_handshake()
@@ -43,7 +43,7 @@ fn recv_push_works() {
 
 #[test]
 fn recv_push_when_push_disabled_is_conn_error() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let (io, srv) = mock::new();
     let mock = srv.assert_client_handshake()
@@ -96,7 +96,7 @@ fn recv_push_when_push_disabled_is_conn_error() {
 
 #[test]
 fn pending_push_promises_reset_when_dropped() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let (io, srv) = mock::new();
     let srv = srv.assert_client_handshake()
@@ -139,7 +139,7 @@ fn pending_push_promises_reset_when_dropped() {
 
 #[test]
 fn recv_push_promise_over_max_header_list_size() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
diff --git a/tests/server.rs b/tests/server.rs
index 36144b5..18b4998 100644
--- a/tests/server.rs
+++ b/tests/server.rs
@@ -6,7 +6,7 @@ const SETTINGS_ACK: &'static [u8] = &[0, 0, 0, 4, 1, 0, 0, 0, 0];
 
 #[test]
 fn read_preface_in_multiple_frames() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .read(b"PRI * HTTP/2.0")
@@ -24,7 +24,7 @@ fn read_preface_in_multiple_frames() {
 
 #[test]
 fn server_builder_set_max_concurrent_streams() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let mut settings = frame::Settings::default();
@@ -74,7 +74,7 @@ fn server_builder_set_max_concurrent_streams() {
 
 #[test]
 fn serve_request() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
@@ -111,7 +111,7 @@ fn accept_with_pending_connections_after_socket_close() {}
 
 #[test]
 fn recv_invalid_authority() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let bad_auth = util::byte_str("not:a/good authority");
@@ -138,7 +138,7 @@ fn recv_invalid_authority() {
 
 #[test]
 fn recv_connection_header() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let req = |id, name, val| {
@@ -173,7 +173,7 @@ fn recv_connection_header() {
 
 #[test]
 fn sends_reset_cancel_when_req_body_is_dropped() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
@@ -206,7 +206,7 @@ fn sends_reset_cancel_when_req_body_is_dropped() {
 
 #[test]
 fn sends_goaway_when_serv_closes_connection() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
@@ -232,7 +232,7 @@ fn sends_goaway_when_serv_closes_connection() {
 
 #[test]
 fn serve_request_then_serv_closes_connection() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
@@ -278,7 +278,7 @@ fn serve_request_then_serv_closes_connection() {
 
 #[test]
 fn sends_reset_cancel_when_res_body_is_dropped() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
@@ -336,7 +336,7 @@ fn sends_reset_cancel_when_res_body_is_dropped() {
 
 #[test]
 fn too_big_headers_sends_431() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
@@ -373,7 +373,7 @@ fn too_big_headers_sends_431() {
 
 #[test]
 fn too_big_headers_sends_reset_after_431_if_not_eos() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
     let client = client
diff --git a/tests/stream_states.rs b/tests/stream_states.rs
index 23f2333..5254fa9 100644
--- a/tests/stream_states.rs
+++ b/tests/stream_states.rs
@@ -6,7 +6,7 @@ use support::prelude::*;
 
 #[test]
 fn send_recv_headers_only() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
@@ -39,7 +39,7 @@ fn send_recv_headers_only() {
 
 #[test]
 fn send_recv_data() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
@@ -102,7 +102,7 @@ fn send_recv_data() {
 
 #[test]
 fn send_headers_recv_data_single_frame() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
@@ -151,7 +151,7 @@ fn send_headers_recv_data_single_frame() {
 
 #[test]
 fn closed_streams_are_released() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let h2 = client::handshake(io).unwrap().and_then(|(mut client, h2)| {
@@ -196,7 +196,7 @@ fn closed_streams_are_released() {
 
 #[test]
 fn errors_if_recv_frame_exceeds_max_frame_size() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, mut srv) = mock::new();
 
     let h2 = client::handshake(io).unwrap().and_then(|(mut client, h2)| {
@@ -251,7 +251,7 @@ fn errors_if_recv_frame_exceeds_max_frame_size() {
 
 #[test]
 fn configure_max_frame_size() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, mut srv) = mock::new();
 
     let h2 = client::Builder::new()
@@ -302,7 +302,7 @@ fn configure_max_frame_size() {
 
 #[test]
 fn recv_goaway_finishes_processed_streams() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -371,7 +371,7 @@ fn recv_goaway_finishes_processed_streams() {
 
 #[test]
 fn recv_next_stream_id_updated_by_malformed_headers() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, client) = mock::new();
 
 
@@ -414,7 +414,7 @@ fn recv_next_stream_id_updated_by_malformed_headers() {
 
 #[test]
 fn skipped_stream_ids_are_implicitly_closed() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv
@@ -468,7 +468,7 @@ fn skipped_stream_ids_are_implicitly_closed() {
 
 #[test]
 fn send_rst_stream_allows_recv_data() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -520,7 +520,7 @@ fn send_rst_stream_allows_recv_data() {
 
 #[test]
 fn send_rst_stream_allows_recv_trailers() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -569,7 +569,7 @@ fn send_rst_stream_allows_recv_trailers() {
 
 #[test]
 fn rst_stream_expires() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -631,7 +631,7 @@ fn rst_stream_expires() {
 
 #[test]
 fn rst_stream_max() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -721,7 +721,7 @@ fn rst_stream_max() {
 
 #[test]
 fn reserved_state_recv_window_update() {
-    let _ = ::env_logger::init();
+    let _ = ::env_logger::try_init();
     let (io, srv) = mock::new();
 
     let srv = srv.assert_client_handshake()
@@ -773,7 +773,7 @@ fn reserved_state_recv_window_update() {
 /*
 #[test]
 fn send_data_after_headers_eos() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
diff --git a/tests/trailers.rs b/tests/trailers.rs
index 397b5ab..4953e48 100644
--- a/tests/trailers.rs
+++ b/tests/trailers.rs
@@ -6,7 +6,7 @@ use support::prelude::*;
 
 #[test]
 fn recv_trailers_only() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()
@@ -52,7 +52,7 @@ fn recv_trailers_only() {
 
 #[test]
 fn send_trailers_immediately() {
-    let _ = env_logger::init();
+    let _ = env_logger::try_init();
 
     let mock = mock_io::Builder::new()
         .handshake()