diff --git a/Cargo.lock b/Cargo.lock
index cdf99f1..40a4fed 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -58,20 +58,6 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
 
-[[package]]
-name = "assert_cmd"
-version = "2.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e996dc7940838b7ef1096b882e29ec30a3149a3a443cdc8dba19ed382eca1fe2"
-dependencies = [
- "bstr",
- "doc-comment",
- "predicates",
- "predicates-core",
- "predicates-tree",
- "wait-timeout",
-]
-
 [[package]]
 name = "assert_fs"
 version = "1.0.6"
@@ -154,6 +140,12 @@ version = "3.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9df67f7bf9ef8498769f994239c45613ef0c5899415fb58e9add412d2c1a538"
 
+[[package]]
+name = "bytes"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
+
 [[package]]
 name = "cast"
 version = "0.2.7"
@@ -231,6 +223,16 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "combine"
+version = "4.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2b2f5d0ee456f3928812dfc8c6d9a1d592b98678f6d56db9b0cd2b7bc6c8db5"
+dependencies = [
+ "bytes",
+ "memchr",
+]
+
 [[package]]
 name = "concolor-clap"
 version = "0.0.6"
@@ -572,15 +574,6 @@ dependencies = [
  "termcolor",
 ]
 
-[[package]]
-name = "float-cmp"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98de4bbd547a563b716d8dfa9aad1cb19bfab00f4fa09a6a4ed21dbcf44ce9c4"
-dependencies = [
- "num-traits",
-]
-
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -610,6 +603,12 @@ version = "0.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0a01e0497841a3b2db4f8afa483cce65f7e96a3498bd6c541734792aeac8fe7"
 
+[[package]]
+name = "glob"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
+
 [[package]]
 name = "globset"
 version = "0.4.8"
@@ -640,6 +639,12 @@ version = "1.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "62aca2aba2d62b4a7f5b33f3712cb1b0692779a56fb510499d5c0aa594daeaf3"
 
+[[package]]
+name = "hashbrown"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -679,6 +684,16 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
 
+[[package]]
+name = "humantime-serde"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac34a56cfd4acddb469cc7fff187ed5ac36f498ba085caf8bbc725e3ff474058"
+dependencies = [
+ "humantime",
+ "serde",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -703,6 +718,16 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.1"
@@ -996,11 +1021,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5c6ce811d0b2e103743eec01db1c50612221f173084ce2f7941053e94b6bb474"
 dependencies = [
  "difflib",
- "float-cmp",
  "itertools",
- "normalize-line-endings",
  "predicates-core",
- "regex",
 ]
 
 [[package]]
@@ -1289,6 +1311,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "shlex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
+
 [[package]]
 name = "simdutf8"
 version = "0.1.3"
@@ -1440,12 +1468,47 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c29c21e11af3c58476a1063cb550e255c45c60928bf7f272462a533e7a2b406"
+dependencies = [
+ "combine",
+ "indexmap",
+ "itertools",
+ "kstring",
+ "serde",
+]
+
 [[package]]
 name = "treeline"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7f741b240f1a48843f9b8e0444fb55fb2a4ff67293b50a9179dfd5ea67f8d41"
 
+[[package]]
+name = "trycmd"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3756168da9e15c2ba53478a9e14661162bd724cc45dc650d1009d80ad46f0cad"
+dependencies = [
+ "concolor-control",
+ "difflib",
+ "glob",
+ "humantime",
+ "humantime-serde",
+ "normalize-line-endings",
+ "rayon",
+ "serde",
+ "shlex",
+ "tempfile",
+ "toml_edit",
+ "wait-timeout",
+ "walkdir",
+ "yansi",
+]
+
 [[package]]
 name = "typed-arena"
 version = "2.0.1"
@@ -1475,7 +1538,6 @@ version = "1.2.1"
 dependencies = [
  "ahash",
  "anyhow",
- "assert_cmd",
  "assert_fs",
  "atty",
  "bstr",
@@ -1497,12 +1559,12 @@ dependencies = [
  "log",
  "maplit",
  "once_cell",
- "predicates",
  "proc-exit",
  "serde",
  "serde_json",
  "structopt",
  "toml",
+ "trycmd",
  "typed-arena",
  "typos",
  "typos-dict",
diff --git a/Cargo.toml b/Cargo.toml
index 3361efe..99002d0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -94,8 +94,7 @@ maplit = "1.0"
 
 [dev-dependencies]
 assert_fs = "1.0"
-assert_cmd = "2.0"
-predicates = "2.0"
+trycmd = "0.2.2"
 criterion = "0.3"
 
 [profile.dev]
diff --git a/tests/cli.rs b/tests/cli.rs
deleted file mode 100644
index 2193332..0000000
--- a/tests/cli.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-use assert_cmd::Command;
-
-#[test]
-#[cfg(feature = "dict")]
-fn test_stdin_success() {
-    let mut cmd = Command::cargo_bin("typos").unwrap();
-    cmd.arg("-").write_stdin("Hello world");
-    cmd.assert().success();
-}
-
-#[test]
-#[cfg(feature = "dict")]
-fn test_stdin_failure() {
-    let mut cmd = Command::cargo_bin("typos").unwrap();
-    cmd.arg("-").write_stdin("Apropriate world");
-    cmd.assert().code(2);
-}
-
-#[test]
-#[cfg(feature = "dict")]
-fn test_stdin_correct() {
-    let mut cmd = Command::cargo_bin("typos").unwrap();
-    cmd.arg("-")
-        .arg("--write-changes")
-        .write_stdin("Apropriate world");
-    cmd.assert().success().stdout("Appropriate world");
-}
-
-#[test]
-#[cfg(feature = "dict")]
-fn test_file_failure() {
-    let mut cmd = Command::cargo_bin("typos").unwrap();
-    cmd.arg("README.md");
-    cmd.assert().code(2);
-}
-
-#[test]
-#[cfg(feature = "dict")]
-fn test_relative_dir_failure() {
-    let mut cmd = Command::cargo_bin("typos").unwrap();
-    cmd.arg(".");
-    cmd.assert().code(2);
-}
-
-#[test]
-#[cfg(feature = "dict")]
-fn test_assumed_dir_failure() {
-    let mut cmd = Command::cargo_bin("typos").unwrap();
-    cmd.assert().code(2);
-}
diff --git a/tests/cli_tests.rs b/tests/cli_tests.rs
new file mode 100644
index 0000000..b81c6d1
--- /dev/null
+++ b/tests/cli_tests.rs
@@ -0,0 +1,5 @@
+#[test]
+#[cfg(feature = "dict")]
+fn cli_tests() {
+    trycmd::TestCases::new().case("tests/cmd/*.toml");
+}
diff --git a/tests/cmd/assumed-dir-failure.toml b/tests/cmd/assumed-dir-failure.toml
new file mode 100644
index 0000000..a04fffd
--- /dev/null
+++ b/tests/cmd/assumed-dir-failure.toml
@@ -0,0 +1,2 @@
+bin.name = "typos"
+status.code = 2
diff --git a/tests/cmd/file-failure.toml b/tests/cmd/file-failure.toml
new file mode 100644
index 0000000..134c44c
--- /dev/null
+++ b/tests/cmd/file-failure.toml
@@ -0,0 +1,3 @@
+bin.name = "typos"
+args = "README.md"
+status.code = 2
diff --git a/tests/cmd/relative-dir-failure.toml b/tests/cmd/relative-dir-failure.toml
new file mode 100644
index 0000000..d742035
--- /dev/null
+++ b/tests/cmd/relative-dir-failure.toml
@@ -0,0 +1,3 @@
+bin.name = "typos"
+args = "."
+status.code = 2
diff --git a/tests/cmd/stdin-correct.stdin b/tests/cmd/stdin-correct.stdin
new file mode 100644
index 0000000..78a4360
--- /dev/null
+++ b/tests/cmd/stdin-correct.stdin
@@ -0,0 +1 @@
+Apropriate world
diff --git a/tests/cmd/stdin-correct.stdout b/tests/cmd/stdin-correct.stdout
new file mode 100644
index 0000000..8d183c3
--- /dev/null
+++ b/tests/cmd/stdin-correct.stdout
@@ -0,0 +1 @@
+Appropriate world
diff --git a/tests/cmd/stdin-correct.toml b/tests/cmd/stdin-correct.toml
new file mode 100644
index 0000000..fd62546
--- /dev/null
+++ b/tests/cmd/stdin-correct.toml
@@ -0,0 +1,2 @@
+bin.name = "typos"
+args = "--write-changes -"
diff --git a/tests/cmd/stdin-failure.stdin b/tests/cmd/stdin-failure.stdin
new file mode 100644
index 0000000..78a4360
--- /dev/null
+++ b/tests/cmd/stdin-failure.stdin
@@ -0,0 +1 @@
+Apropriate world
diff --git a/tests/cmd/stdin-failure.toml b/tests/cmd/stdin-failure.toml
new file mode 100644
index 0000000..74181fa
--- /dev/null
+++ b/tests/cmd/stdin-failure.toml
@@ -0,0 +1,3 @@
+bin.name = "typos"
+args = "-"
+status.code = 2
diff --git a/tests/cmd/stdin-success.stdin b/tests/cmd/stdin-success.stdin
new file mode 100644
index 0000000..802992c
--- /dev/null
+++ b/tests/cmd/stdin-success.stdin
@@ -0,0 +1 @@
+Hello world
diff --git a/tests/cmd/stdin-success.toml b/tests/cmd/stdin-success.toml
new file mode 100644
index 0000000..15dd0dd
--- /dev/null
+++ b/tests/cmd/stdin-success.toml
@@ -0,0 +1,2 @@
+bin.name = "typos"
+args = "-"