diff --git a/Cargo.lock b/Cargo.lock
index 07998814..462bfe72 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -318,6 +318,18 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "771fe0050b883fcc3ea2359b1a96bcfbc090b7116eae7c3c512c7a083fdf23d3"
 
+[[package]]
+name = "bstr"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
+dependencies = [
+ "lazy_static",
+ "memchr",
+ "regex-automata",
+ "serde",
+]
+
 [[package]]
 name = "build_const"
 version = "0.2.2"
@@ -388,6 +400,15 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "cast"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c24dab4283a142afa2fdca129b80ad2c6284e073930f964c3a1293c225ee39a"
+dependencies = [
+ "rustc_version",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.72"
@@ -440,6 +461,17 @@ dependencies = [
  "generic-array 0.14.5",
 ]
 
+[[package]]
+name = "clap"
+version = "2.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
+dependencies = [
+ "bitflags",
+ "textwrap 0.11.0",
+ "unicode-width",
+]
+
 [[package]]
 name = "clap"
 version = "3.0.13"
@@ -454,7 +486,7 @@ dependencies = [
  "os_str_bytes",
  "strsim",
  "termcolor",
- "textwrap",
+ "textwrap 0.14.2",
 ]
 
 [[package]]
@@ -668,6 +700,44 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "criterion"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1604dafd25fba2fe2d5895a9da139f8dc9b319a5fe5354ca137cbbce4e178d10"
+dependencies = [
+ "atty",
+ "cast",
+ "clap 2.34.0",
+ "criterion-plot",
+ "csv",
+ "futures",
+ "itertools",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_cbor",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "tokio",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d00996de9f2f7559f7f4dc286073197f83e92256a59ed395f9aac01fe717da57"
+dependencies = [
+ "cast",
+ "itertools",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.2"
@@ -761,6 +831,38 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "csv"
+version = "1.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22813a6dc45b335f9bade10bf7271dc477e81113e89eb251a0bc2a8a81c536e1"
+dependencies = [
+ "bstr",
+ "csv-core",
+ "itoa 0.4.8",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "csv-core"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b2466559f260f48ad25fe6317b3c8dac77b5bdb5763ac7d9d6103530663bc90"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "ctor"
+version = "0.1.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccc0a48a9b826acdf4028595adc9db92caea352f7af011a3034acd172a52a0aa"
+dependencies = [
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "ctr"
 version = "0.8.0"
@@ -967,6 +1069,19 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b2cf0344971ee6c64c31be0d530793fba457d322dfec2810c453d0ef228f9c3"
+dependencies = [
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "eth-keystore"
 version = "0.4.1"
@@ -1072,7 +1187,10 @@ dependencies = [
  "ethers-contract-derive",
  "ethers-core",
  "ethers-derive-eip712",
+ "ethers-middleware",
  "ethers-providers",
+ "ethers-signers",
+ "ethers-solc",
  "futures-util",
  "hex",
  "once_cell",
@@ -1091,6 +1209,7 @@ dependencies = [
  "cfg-if 1.0.0",
  "dunce",
  "ethers-core",
+ "ethers-solc",
  "eyre",
  "getrandom 0.2.7",
  "hex",
@@ -1100,6 +1219,7 @@ dependencies = [
  "serde",
  "serde_json",
  "syn",
+ "tempfile",
  "url",
  "walkdir",
 ]
@@ -1152,7 +1272,10 @@ dependencies = [
 name = "ethers-derive-eip712"
 version = "0.13.0"
 dependencies = [
+ "ethers-contract",
+ "ethers-contract-derive",
  "ethers-core",
+ "ethers-signers",
  "hex",
  "quote",
  "serde_json",
@@ -1164,13 +1287,18 @@ name = "ethers-etherscan"
 version = "0.13.0"
 dependencies = [
  "ethers-core",
+ "ethers-solc",
  "reqwest",
  "semver",
  "serde",
  "serde-aux",
  "serde_json",
+ "serial_test",
+ "tempfile",
  "thiserror",
+ "tokio",
  "tracing",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -1183,12 +1311,17 @@ dependencies = [
  "ethers-etherscan",
  "ethers-providers",
  "ethers-signers",
+ "ethers-solc",
  "futures-locks",
  "futures-util",
+ "hex",
  "instant",
+ "once_cell",
+ "rand 0.8.5",
  "reqwest",
  "serde",
  "serde_json",
+ "serial_test",
  "thiserror",
  "tokio",
  "tracing",
@@ -1271,7 +1404,9 @@ version = "0.13.0"
 dependencies = [
  "cfg-if 1.0.0",
  "colored",
+ "criterion",
  "dunce",
+ "env_logger",
  "ethers-core",
  "fs_extra",
  "futures-util",
@@ -1283,6 +1418,7 @@ dependencies = [
  "num_cpus",
  "once_cell",
  "path-slash",
+ "pretty_assertions",
  "rand 0.8.5",
  "rayon",
  "regex",
@@ -1298,6 +1434,7 @@ dependencies = [
  "tiny-keccak",
  "tokio",
  "tracing",
+ "tracing-subscriber",
  "walkdir",
 ]
 
@@ -1618,6 +1755,12 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "half"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eabb4a44450da02c90444cf74558da904edde8fb4e9035a9a6a4e15445af0bd7"
+
 [[package]]
 name = "hashbrown"
 version = "0.11.2"
@@ -1708,7 +1851,7 @@ checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
 dependencies = [
  "bytes",
  "fnv",
- "itoa",
+ "itoa 1.0.1",
 ]
 
 [[package]]
@@ -1734,6 +1877,12 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "hyper"
 version = "0.14.19"
@@ -1749,7 +1898,7 @@ dependencies = [
  "http-body",
  "httparse",
  "httpdate",
- "itoa",
+ "itoa 1.0.1",
  "pin-project-lite",
  "socket2",
  "tokio",
@@ -1888,6 +2037,12 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itoa"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
+
 [[package]]
 name = "itoa"
 version = "1.0.1"
@@ -1997,6 +2152,15 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "matchers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.9"
@@ -2149,6 +2313,12 @@ version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225"
 
+[[package]]
+name = "oorandom"
+version = "11.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -2203,6 +2373,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "output_vt100"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53cdc5b785b7a58c5aad8216b3dfa114df64b0b06ae6e1501cef91df2fbdf8f9"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "p256"
 version = "0.10.1"
@@ -2496,6 +2675,34 @@ version = "0.3.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe"
 
+[[package]]
+name = "plotters"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a3fd9ec30b9749ce28cd91f255d569591cdf937fe280c312143e3c4bad6f2a"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d88417318da0eaf0fdcdb51a0ee6c3bed624333bff8f946733049380be67ac1c"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521fa9638fa597e1dc53e9412a4f9cefb01187ee1f7413076f9e6749e2885ba9"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.16"
@@ -2508,6 +2715,18 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
+[[package]]
+name = "pretty_assertions"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c89f989ac94207d048d92db058e4f6ec7342b0971fc58d1271ca148b799b3563"
+dependencies = [
+ "ansi_term",
+ "ctor",
+ "diff",
+ "output_vt100",
+]
+
 [[package]]
 name = "primitive-types"
 version = "0.11.1"
@@ -2722,6 +2941,15 @@ dependencies = [
  "regex-syntax",
 ]
 
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax",
+]
+
 [[package]]
 name = "regex-syntax"
 version = "0.6.26"
@@ -3122,6 +3350,16 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "serde_cbor"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bef2ebfde456fb76bbcf9f59315333decc4fda0b2b44b420243c11e0f5ec1f5"
+dependencies = [
+ "half",
+ "serde",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.137"
@@ -3139,7 +3377,7 @@ version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
 dependencies = [
- "itoa",
+ "itoa 1.0.1",
  "ryu",
  "serde",
 ]
@@ -3151,11 +3389,35 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
 dependencies = [
  "form_urlencoded",
- "itoa",
+ "itoa 1.0.1",
  "ryu",
  "serde",
 ]
 
+[[package]]
+name = "serial_test"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5bcc41d18f7a1d50525d080fd3e953be87c4f9f1a974f3c21798ca00d54ec15"
+dependencies = [
+ "lazy_static",
+ "parking_lot 0.11.2",
+ "serial_test_derive",
+]
+
+[[package]]
+name = "serial_test_derive"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2881bccd7d60fb32dfa3d7b3136385312f8ad75e2674aab2852867a09790cae8"
+dependencies = [
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn",
+]
+
 [[package]]
 name = "sha-1"
 version = "0.10.0"
@@ -3409,7 +3671,7 @@ checksum = "462a64764fb3e8f26469f1c84e30240405f8a641b633b6e2b3d8c83e73f6f67a"
 dependencies = [
  "anyhow",
  "cfg-if 1.0.0",
- "clap",
+ "clap 3.0.13",
  "console 0.14.1",
  "dialoguer",
  "fs2",
@@ -3517,6 +3779,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.14.2"
@@ -3572,6 +3843,16 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.5.1"
@@ -3747,9 +4028,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4bc28f93baff38037f64e6f43d34cfa1605f27a49c34e8a04c5e78b0babf2596"
 dependencies = [
  "ansi_term",
+ "lazy_static",
+ "matchers",
+ "regex",
  "sharded-slab",
  "smallvec",
  "thread_local",
+ "tracing",
  "tracing-core",
  "tracing-log",
 ]
diff --git a/ethers-contract/Cargo.toml b/ethers-contract/Cargo.toml
index ed1d9d2e..4f42a6cb 100644
--- a/ethers-contract/Cargo.toml
+++ b/ethers-contract/Cargo.toml
@@ -24,6 +24,16 @@ pin-project = {version = "1.0.7", default-features = false }
 futures-util = { version = "^0.3" }
 hex = { version = "0.4.3", default-features = false, features = ["std"] }
 
+[dev-dependencies]
+ethers-middleware = { version = "^0.13.0", path = "../ethers-middleware" }
+ethers-providers = { version = "^0.13.0", path = "../ethers-providers", default-features = false, features = ["ws"] }
+ethers-signers = { version = "^0.13.0", path = "../ethers-signers" }
+ethers-contract-abigen = { version = "^0.13.0", path = "ethers-contract-abigen" }
+ethers-contract-derive = { version = "^0.13.0", path = "ethers-contract-derive" }
+ethers-core = { version = "^0.13.0", path = "../ethers-core", default-features = false, features = ["eip712"]}
+ethers-derive-eip712 = { version = "^0.13.0", path = "../ethers-core/ethers-derive-eip712"}
+ethers-solc = { version = "^0.13.0", path = "../ethers-solc", default-features = false }
+
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 tokio = { version = "1.18", default-features = false, features = ["macros"] }
 
diff --git a/ethers-contract/ethers-contract-abigen/Cargo.toml b/ethers-contract/ethers-contract-abigen/Cargo.toml
index b7e51c85..d011b1e3 100644
--- a/ethers-contract/ethers-contract-abigen/Cargo.toml
+++ b/ethers-contract/ethers-contract-abigen/Cargo.toml
@@ -38,3 +38,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 default = ["reqwest", "rustls"]
 openssl = ["reqwest/native-tls"]
 rustls = ["reqwest/rustls-tls"]
+
+[dev-dependencies]
+tempfile = "3.2.0"
+ethers-solc = { version = "^0.13.0", path = "../../ethers-solc", default-features = false, features = ["project-util"] }
diff --git a/ethers-core/ethers-derive-eip712/Cargo.toml b/ethers-core/ethers-derive-eip712/Cargo.toml
index 97f14406..b3d18f28 100644
--- a/ethers-core/ethers-derive-eip712/Cargo.toml
+++ b/ethers-core/ethers-derive-eip712/Cargo.toml
@@ -14,3 +14,8 @@ syn = "1.0.77"
 ethers-core = { version = "^0.13.0", path = "../", default-features = false, features = ["eip712", "macros"] }
 hex = "0.4.3"
 serde_json = "1.0.68"
+
+[dev-dependencies]
+ethers-contract = { version = "^0.13.0", path = "../../ethers-contract", features = ["abigen"]}
+ethers-contract-derive = { version = "^0.13.0", path = "../../ethers-contract/ethers-contract-derive" }
+ethers-signers = { version = "^0.13.0", path = "../../ethers-signers" }
diff --git a/ethers-etherscan/Cargo.toml b/ethers-etherscan/Cargo.toml
index 2f33a393..a3fa57bb 100644
--- a/ethers-etherscan/Cargo.toml
+++ b/ethers-etherscan/Cargo.toml
@@ -23,6 +23,13 @@ thiserror = "1.0"
 tracing = "0.1.35"
 semver = "1.0.10"
 
+[dev-dependencies]
+tempfile = "3.3.0"
+tokio = { version = "1.18", features = ["macros", "rt-multi-thread", "time"] }
+serial_test = "0.6.0"
+tracing-subscriber = { version = "0.3", default-features = false, features = ["env-filter", "fmt"] }
+ethers-solc = { version = "^0.13.0", path = "../ethers-solc", default-features = false }
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
diff --git a/ethers-middleware/Cargo.toml b/ethers-middleware/Cargo.toml
index 9d22dcf6..dafaeb46 100644
--- a/ethers-middleware/Cargo.toml
+++ b/ethers-middleware/Cargo.toml
@@ -38,6 +38,14 @@ instant = {version = "0.1.12", features = ["now"] }
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 tokio = { version = "1.18" }
 
+[dev-dependencies]
+hex = { version = "0.4.3", default-features = false, features = ["std"] }
+rand = { version = "0.8.5", default-features = false }
+ethers-providers = { version = "^0.13.0", path = "../ethers-providers", default-features = false, features = ["ws", "rustls"] }
+once_cell = "1.12.0"
+ethers-solc = { version = "^0.13.0", path = "../ethers-solc", default-features = false }
+serial_test = "0.6.0"
+
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 tokio = { version = "1.18", default-features = false, features = ["rt", "macros", "time"] }
 
diff --git a/ethers-solc/Cargo.toml b/ethers-solc/Cargo.toml
index 2be2c91d..91c17142 100644
--- a/ethers-solc/Cargo.toml
+++ b/ethers-solc/Cargo.toml
@@ -50,6 +50,15 @@ svm-builds = { package = "svm-rs-builds", version = "0.1.0", optional = true}
 # NOTE: this enables wasm compatibility for getrandom indirectly
 getrandom = { version = "0.2", features = ["js"] }
 
+[dev-dependencies]
+criterion = { version = "0.3", features = ["async_tokio"] }
+env_logger = "*"
+tracing-subscriber = {version = "0.3", default-features = false, features = ["env-filter", "fmt"]}
+rand = "0.8.5"
+pretty_assertions = "1.2.1"
+tempfile = "3.3.0"
+tokio = { version = "1.18", features = ["full"] }
+
 [[bench]]
 name = "compile_many"
 harness = false