diff --git a/Cargo.lock b/Cargo.lock
index 90312e0..c80322a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -602,9 +602,9 @@ checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
 
 [[package]]
 name = "env_logger"
-version = "0.7.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
+checksum = "f26ecb66b4bdca6c1409b40fb255eefc2bd4f6d135dab3c3124f80ffa2a9661e"
 dependencies = [
  "log",
  "regex",
@@ -1216,21 +1216,20 @@ dependencies = [
 
 [[package]]
 name = "quickcheck"
-version = "0.9.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a44883e74aa97ad63db83c4bf8ca490f02b2fc02f92575e720c8551e843c945f"
+checksum = "588f6378e4dd99458b60ec275b4477add41ce4fa9f64dcba6f15adccb19b50d6"
 dependencies = [
  "env_logger",
  "log",
- "rand 0.7.3",
- "rand_core 0.5.1",
+ "rand 0.8.3",
 ]
 
 [[package]]
 name = "quickcheck_macros"
-version = "0.9.1"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "608c156fd8e97febc07dc9c2e2c80bf74cfc6ef26893eae3daf8bc2bc94a4b7f"
+checksum = "b22a693222d716a9587786f37ac3f6b4faedb5b80c23914e7303ff5a1d8016e9"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 552a2ca..2d2faf1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,6 +35,9 @@ aquatic_ws_protocol = { path = "aquatic_ws_protocol" }
 debug = true
 lto = true
 
+[profile.test]
+opt-level = 3
+
 [profile.bench]
 debug = true
 opt-level = 3
diff --git a/aquatic_http/Cargo.toml b/aquatic_http/Cargo.toml
index 65d4a3b..da71513 100644
--- a/aquatic_http/Cargo.toml
+++ b/aquatic_http/Cargo.toml
@@ -39,5 +39,5 @@ smartstring = "0.2"
 socket2 = { version = "0.3", features = ["reuseport"] }
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_http_load_test/Cargo.toml b/aquatic_http_load_test/Cargo.toml
index 4262dc1..a5b2edb 100644
--- a/aquatic_http_load_test/Cargo.toml
+++ b/aquatic_http_load_test/Cargo.toml
@@ -21,5 +21,5 @@ rand_distr = "0.4"
 serde = { version = "1", features = ["derive"] }
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_http_protocol/Cargo.toml b/aquatic_http_protocol/Cargo.toml
index 6d757a0..fd5cbba 100644
--- a/aquatic_http_protocol/Cargo.toml
+++ b/aquatic_http_protocol/Cargo.toml
@@ -43,5 +43,5 @@ urlencoding = "1"
 [dev-dependencies]
 bendy = { version = "0.3", features = ["std", "serde"] }
 criterion = "0.3"
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
\ No newline at end of file
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
\ No newline at end of file
diff --git a/aquatic_http_protocol/src/common.rs b/aquatic_http_protocol/src/common.rs
index a0d5d4a..1ee1c2b 100644
--- a/aquatic_http_protocol/src/common.rs
+++ b/aquatic_http_protocol/src/common.rs
@@ -60,7 +60,7 @@ impl FromStr for AnnounceEvent {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for InfoHash {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         let mut arr = [b'0'; 20];
 
         for byte in arr.iter_mut(){
@@ -74,7 +74,7 @@ impl quickcheck::Arbitrary for InfoHash {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for PeerId {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         let mut arr = [b'0'; 20];
 
         for byte in arr.iter_mut(){
@@ -88,7 +88,7 @@ impl quickcheck::Arbitrary for PeerId {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for AnnounceEvent {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         match (bool::arbitrary(g), bool::arbitrary(g)){
             (false, false) => Self::Started,
             (true, false) => Self::Started,
diff --git a/aquatic_http_protocol/src/request.rs b/aquatic_http_protocol/src/request.rs
index 5fde02a..c2af708 100644
--- a/aquatic_http_protocol/src/request.rs
+++ b/aquatic_http_protocol/src/request.rs
@@ -322,7 +322,7 @@ mod tests {
     }
 
     impl Arbitrary for AnnounceRequest {
-        fn arbitrary<G: Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut Gen) -> Self {
             let key: Option<String> = Arbitrary::arbitrary(g);
 
             AnnounceRequest {
@@ -339,7 +339,7 @@ mod tests {
     }
 
     impl Arbitrary for ScrapeRequest {
-        fn arbitrary<G: Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut Gen) -> Self {
             ScrapeRequest {
                 info_hashes: Arbitrary::arbitrary(g),
             }
@@ -347,7 +347,7 @@ mod tests {
     }
 
     impl Arbitrary for Request {
-        fn arbitrary<G: Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut Gen) -> Self {
             if Arbitrary::arbitrary(g){
                 Self::Announce(Arbitrary::arbitrary(g))
             } else {
diff --git a/aquatic_http_protocol/src/response.rs b/aquatic_http_protocol/src/response.rs
index 7d3031e..b301c4a 100644
--- a/aquatic_http_protocol/src/response.rs
+++ b/aquatic_http_protocol/src/response.rs
@@ -192,7 +192,7 @@ impl Response {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ResponsePeer<Ipv4Addr> {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             ip_address: Ipv4Addr::arbitrary(g),
             port: u16::arbitrary(g)
@@ -203,7 +203,7 @@ impl quickcheck::Arbitrary for ResponsePeer<Ipv4Addr> {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ResponsePeer<Ipv6Addr> {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             ip_address: Ipv6Addr::arbitrary(g),
             port: u16::arbitrary(g)
@@ -214,7 +214,7 @@ impl quickcheck::Arbitrary for ResponsePeer<Ipv6Addr> {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ResponsePeerListV4 {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self(Vec::arbitrary(g))
     }
 }
@@ -222,7 +222,7 @@ impl quickcheck::Arbitrary for ResponsePeerListV4 {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ResponsePeerListV6 {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self(Vec::arbitrary(g))
     }
 }
@@ -230,7 +230,7 @@ impl quickcheck::Arbitrary for ResponsePeerListV6 {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ScrapeStatistics {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             complete: usize::arbitrary(g),
             incomplete: usize::arbitrary(g),
@@ -242,7 +242,7 @@ impl quickcheck::Arbitrary for ScrapeStatistics {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for AnnounceResponse {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             announce_interval: usize::arbitrary(g),
             complete: usize::arbitrary(g),
@@ -256,7 +256,7 @@ impl quickcheck::Arbitrary for AnnounceResponse {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ScrapeResponse {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             files: BTreeMap::arbitrary(g),
         }
@@ -266,7 +266,7 @@ impl quickcheck::Arbitrary for ScrapeResponse {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for FailureResponse {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             failure_reason: String::arbitrary(g),
         }
diff --git a/aquatic_udp/Cargo.toml b/aquatic_udp/Cargo.toml
index 4196f3c..15c43b3 100644
--- a/aquatic_udp/Cargo.toml
+++ b/aquatic_udp/Cargo.toml
@@ -33,5 +33,5 @@ serde = { version = "1", features = ["derive"] }
 socket2 = { version = "0.3", features = ["reuseport"] }
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_udp/src/lib/handlers.rs b/aquatic_udp/src/lib/handlers.rs
index aae5cdd..33c3041 100644
--- a/aquatic_udp/src/lib/handlers.rs
+++ b/aquatic_udp/src/lib/handlers.rs
@@ -414,17 +414,19 @@ mod tests {
 
     #[test]
     fn test_extract_response_peers(){
-        fn prop(data: (u32, u16)) -> TestResult {
-            let gen_num_peers = data.0;
+        fn prop(data: (u16, u16)) -> TestResult {
+            let gen_num_peers = data.0 as u32;
             let req_num_peers = data.1 as usize;
 
-            let mut peer_map: PeerMap<Ipv4Addr> = IndexMap::new();
+            let mut peer_map: PeerMap<Ipv4Addr> = IndexMap::with_capacity(
+                gen_num_peers as usize
+            );
 
             let mut opt_sender_key = None;
             let mut opt_sender_peer = None;
 
             for i in 0..gen_num_peers {
-                let (key, value) = gen_peer_map_key_and_value(i);
+                let (key, value) = gen_peer_map_key_and_value((i << 16) + i);
 
                 if i == 0 {
                     opt_sender_key = Some(key);
@@ -456,7 +458,7 @@ mod tests {
             // Check that returned peers are unique (no overlap) and that sender
             // isn't returned
 
-            let mut ip_addresses = HashSet::new();
+            let mut ip_addresses = HashSet::with_capacity(peers.len());
 
             for peer in peers {
                 if peer == opt_sender_peer.clone().unwrap() || ip_addresses.contains(&peer.ip_address){
@@ -471,6 +473,6 @@ mod tests {
             TestResult::from_bool(success)
         }   
 
-        quickcheck(prop as fn((u32, u16)) -> TestResult);
+        quickcheck(prop as fn((u16, u16)) -> TestResult);
     }
 }
\ No newline at end of file
diff --git a/aquatic_udp_load_test/Cargo.toml b/aquatic_udp_load_test/Cargo.toml
index 5e899e8..6f4d2c0 100644
--- a/aquatic_udp_load_test/Cargo.toml
+++ b/aquatic_udp_load_test/Cargo.toml
@@ -24,5 +24,5 @@ serde = { version = "1", features = ["derive"] }
 socket2 = { version = "0.3", features = ["reuseport"] }
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_udp_protocol/Cargo.toml b/aquatic_udp_protocol/Cargo.toml
index 180efaa..e70ad78 100644
--- a/aquatic_udp_protocol/Cargo.toml
+++ b/aquatic_udp_protocol/Cargo.toml
@@ -11,5 +11,5 @@ repository = "https://github.com/greatest-ape/aquatic"
 byteorder = "1"
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
\ No newline at end of file
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
\ No newline at end of file
diff --git a/aquatic_udp_protocol/src/common.rs b/aquatic_udp_protocol/src/common.rs
index 24f1026..1b36990 100644
--- a/aquatic_udp_protocol/src/common.rs
+++ b/aquatic_udp_protocol/src/common.rs
@@ -52,7 +52,7 @@ pub struct ResponsePeer {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for IpVersion {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         if bool::arbitrary(g) {
             IpVersion::IPv4
         } else {
@@ -64,7 +64,7 @@ impl quickcheck::Arbitrary for IpVersion {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for InfoHash {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         let mut bytes = [0u8; 20];
 
         for byte in bytes.iter_mut() {
@@ -78,7 +78,7 @@ impl quickcheck::Arbitrary for InfoHash {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for PeerId {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         let mut bytes = [0u8; 20];
 
         for byte in bytes.iter_mut() {
@@ -92,7 +92,7 @@ impl quickcheck::Arbitrary for PeerId {
 
 #[cfg(test)]
 impl quickcheck::Arbitrary for ResponsePeer {
-    fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+    fn arbitrary(g: &mut quickcheck::Gen) -> Self {
         Self {
             ip_address: ::std::net::IpAddr::arbitrary(g),
             port: Port(u16::arbitrary(g)),
diff --git a/aquatic_udp_protocol/src/request.rs b/aquatic_udp_protocol/src/request.rs
index f369d31..729fe46 100644
--- a/aquatic_udp_protocol/src/request.rs
+++ b/aquatic_udp_protocol/src/request.rs
@@ -292,7 +292,7 @@ mod tests {
     use super::*;
 
     impl quickcheck::Arbitrary for AnnounceEvent {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             match (bool::arbitrary(g), bool::arbitrary(g)){
                 (false, false) => Self::Started,
                 (true, false) => Self::Started,
@@ -303,7 +303,7 @@ mod tests {
     }
 
     impl quickcheck::Arbitrary for ConnectRequest {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 transaction_id: TransactionId(i32::arbitrary(g)),
             }
@@ -311,7 +311,7 @@ mod tests {
     }
 
     impl quickcheck::Arbitrary for AnnounceRequest {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 connection_id: ConnectionId(i64::arbitrary(g)),
                 transaction_id: TransactionId(i32::arbitrary(g)),
@@ -330,7 +330,7 @@ mod tests {
     }
 
     impl quickcheck::Arbitrary for ScrapeRequest {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             let info_hashes = (0..u8::arbitrary(g)).map(|_| {
                 InfoHash::arbitrary(g)
             }).collect();
diff --git a/aquatic_udp_protocol/src/response.rs b/aquatic_udp_protocol/src/response.rs
index b17c3b2..e62e8c9 100644
--- a/aquatic_udp_protocol/src/response.rs
+++ b/aquatic_udp_protocol/src/response.rs
@@ -279,7 +279,7 @@ mod tests {
     use super::*;
 
     impl quickcheck::Arbitrary for TorrentScrapeStatistics {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 seeders: NumberOfPeers(i32::arbitrary(g)),
                 completed: NumberOfDownloads(i32::arbitrary(g)),
@@ -289,7 +289,7 @@ mod tests {
     }
     
     impl quickcheck::Arbitrary for ConnectResponse {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 connection_id: ConnectionId(i64::arbitrary(g)),
                 transaction_id: TransactionId(i32::arbitrary(g)),
@@ -298,7 +298,7 @@ mod tests {
     }
     
     impl quickcheck::Arbitrary for AnnounceResponse {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             let peers = (0..u8::arbitrary(g)).map(|_| {
                 ResponsePeer::arbitrary(g)
             }).collect();
@@ -314,7 +314,7 @@ mod tests {
     }
 
     impl quickcheck::Arbitrary for ScrapeResponse {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             let torrent_stats = (0..u8::arbitrary(g)).map(|_| {
                 TorrentScrapeStatistics::arbitrary(g)
             }).collect();
diff --git a/aquatic_ws/Cargo.toml b/aquatic_ws/Cargo.toml
index a7b17a5..e105448 100644
--- a/aquatic_ws/Cargo.toml
+++ b/aquatic_ws/Cargo.toml
@@ -37,5 +37,5 @@ socket2 = { version = "0.3", features = ["reuseport"] }
 tungstenite = "0.11"
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_ws_load_test/Cargo.toml b/aquatic_ws_load_test/Cargo.toml
index 31f567c..8275c0a 100644
--- a/aquatic_ws_load_test/Cargo.toml
+++ b/aquatic_ws_load_test/Cargo.toml
@@ -24,5 +24,5 @@ slab = "0.4"
 tungstenite = "0.11"
 
 [dev-dependencies]
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_ws_protocol/Cargo.toml b/aquatic_ws_protocol/Cargo.toml
index 2660a5f..a886b73 100644
--- a/aquatic_ws_protocol/Cargo.toml
+++ b/aquatic_ws_protocol/Cargo.toml
@@ -26,5 +26,5 @@ tungstenite = "0.11"
 
 [dev-dependencies]
 criterion = "0.3"
-quickcheck = "0.9"
-quickcheck_macros = "0.9"
+quickcheck = "1.0"
+quickcheck_macros = "1.0"
diff --git a/aquatic_ws_protocol/src/lib.rs b/aquatic_ws_protocol/src/lib.rs
index c7da48d..6ee663a 100644
--- a/aquatic_ws_protocol/src/lib.rs
+++ b/aquatic_ws_protocol/src/lib.rs
@@ -320,7 +320,7 @@ mod tests {
 
     use super::*;
 
-    fn arbitrary_20_bytes<G: quickcheck::Gen>(g: &mut G) -> [u8; 20] {
+    fn arbitrary_20_bytes(g: &mut quickcheck::Gen) -> [u8; 20] {
         let mut bytes = [0u8; 20];
 
         for byte in bytes.iter_mut() {
@@ -335,25 +335,25 @@ mod tests {
     }
 
     impl Arbitrary for InfoHash {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self(arbitrary_20_bytes(g))
         }
     }
 
     impl Arbitrary for PeerId {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self(arbitrary_20_bytes(g))
         }
     }
 
     impl Arbitrary for OfferId {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self(arbitrary_20_bytes(g))
         }
     }
 
     impl Arbitrary for AnnounceEvent {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             match (bool::arbitrary(g), bool::arbitrary(g)){
                 (false, false) => Self::Started,
                 (true, false) => Self::Started,
@@ -364,7 +364,7 @@ mod tests {
     }
 
     impl Arbitrary for MiddlemanOfferToPeer {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 action: AnnounceAction,
                 peer_id: Arbitrary::arbitrary(g),
@@ -376,7 +376,7 @@ mod tests {
     }
 
     impl Arbitrary for MiddlemanAnswerToPeer {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 action: AnnounceAction,
                 peer_id: Arbitrary::arbitrary(g),
@@ -388,7 +388,7 @@ mod tests {
     }
 
     impl Arbitrary for AnnounceRequestOffer {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 offer_id: Arbitrary::arbitrary(g),
                 offer: sdp_json_value()
@@ -397,7 +397,7 @@ mod tests {
     }
 
     impl Arbitrary for AnnounceRequest {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             let has_offers_or_answer_or_neither: Option<bool> = Arbitrary::arbitrary(g);
 
             let mut offers: Option<Vec<AnnounceRequestOffer>> = None;
@@ -436,7 +436,7 @@ mod tests {
     }
 
     impl Arbitrary for AnnounceResponse {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 action: AnnounceAction,
                 info_hash: Arbitrary::arbitrary(g),
@@ -448,7 +448,7 @@ mod tests {
     }
 
     impl Arbitrary for ScrapeRequest {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 action: ScrapeAction,
                 info_hashes: Arbitrary::arbitrary(g),
@@ -458,7 +458,7 @@ mod tests {
 
 
     impl Arbitrary for ScrapeRequestInfoHashes {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             if Arbitrary::arbitrary(g) {
                 ScrapeRequestInfoHashes::Multiple(Arbitrary::arbitrary(g))
             } else {
@@ -468,7 +468,7 @@ mod tests {
     }
 
     impl Arbitrary for ScrapeStatistics {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             Self {
                 complete: Arbitrary::arbitrary(g),
                 incomplete: Arbitrary::arbitrary(g),
@@ -478,7 +478,7 @@ mod tests {
     }
 
     impl Arbitrary for ScrapeResponse {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             let files: Vec<(InfoHash, ScrapeStatistics)> = Arbitrary::arbitrary(g);
 
             Self {
@@ -489,7 +489,7 @@ mod tests {
     }
 
     impl Arbitrary for InMessage {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             if Arbitrary::arbitrary(g){
                 Self::AnnounceRequest(Arbitrary::arbitrary(g))
             } else {
@@ -499,7 +499,7 @@ mod tests {
     }
 
     impl Arbitrary for OutMessage {
-        fn arbitrary<G: quickcheck::Gen>(g: &mut G) -> Self {
+        fn arbitrary(g: &mut quickcheck::Gen) -> Self {
             match (Arbitrary::arbitrary(g), Arbitrary::arbitrary(g)){
                 (false, false) => Self::AnnounceResponse(Arbitrary::arbitrary(g)),
                 (true, false) => Self::ScrapeResponse(Arbitrary::arbitrary(g)),