diff --git a/test/cli/index.js b/test/cli/index.js
index 0e1a58d0437..b89492bd653 100644
--- a/test/cli/index.js
+++ b/test/cli/index.js
@@ -23,15 +23,10 @@ runTestSuiteWithSamples(
 			done => {
 				process.chdir(config.cwd || dir);
 
-				const command = config.command
-					.replace(
-						/(^| )rollup($| )/g,
-						`node ${path.resolve(__dirname, '../../dist/bin')}${path.sep}rollup `
-					)
-					.replace(
-						/(^| )shx /g,
-						`node ${path.resolve(__dirname, '../../node_modules/.bin')}${path.sep}shx `
-					);
+				const command = config.command.replace(
+					/(^| )rollup($| )/g,
+					`node ${path.resolve(__dirname, '../../dist/bin')}${path.sep}rollup `
+				);
 
 				const childProcess = exec(
 					command,
diff --git a/test/cli/samples/stdin/config-file/_config.js b/test/cli/samples/stdin/config-file/_config.js
index e9d2e8a0931..fb19d16e661 100644
--- a/test/cli/samples/stdin/config-file/_config.js
+++ b/test/cli/samples/stdin/config-file/_config.js
@@ -1,5 +1,5 @@
 module.exports = {
 	description:
 		'does not replace input with stdin but allows referencing it when using a config file',
-	command: `shx echo "import {PRINT as p} from './a'; import C from  './b'; 0 && fail() || p(C); export {C as value, p as print}" | rollup -c`
+	command: `echo "import {PRINT as p} from './a'; import C from  './b'; 0 && fail() || p(C); export {C as value, p as print}" | rollup -c`
 };
diff --git a/test/cli/samples/stdin/force-stdin-config-file/_config.js b/test/cli/samples/stdin/force-stdin-config-file/_config.js
index ac8dc4c73d7..eb925701928 100644
--- a/test/cli/samples/stdin/force-stdin-config-file/_config.js
+++ b/test/cli/samples/stdin/force-stdin-config-file/_config.js
@@ -1,4 +1,4 @@
 module.exports = {
 	description: 'allows forcing inputs to be replaced with stdin in config files',
-	command: `shx echo "console.log('STDIN');" | rollup -c --stdin`
+	command: `echo "console.log('STDIN');" | rollup -c --stdin`
 };
diff --git a/test/cli/samples/stdin/force-stdin-tty/_config.js b/test/cli/samples/stdin/force-stdin-tty/_config.js
index c19b71726db..42ee574f29c 100644
--- a/test/cli/samples/stdin/force-stdin-tty/_config.js
+++ b/test/cli/samples/stdin/force-stdin-tty/_config.js
@@ -1,4 +1,4 @@
 module.exports = {
 	description: 'allows forcing stdin input on TTY interfaces via option',
-	command: `shx echo "console.log('PASS');" | ./wrapper.js -f es --stdin`
+	command: `echo "console.log('PASS');" | ./wrapper.js -f es --stdin`
 };
diff --git a/test/cli/samples/stdin/no-dash/_config.js b/test/cli/samples/stdin/no-dash/_config.js
index bfc70f159ba..b5ebd2b7042 100644
--- a/test/cli/samples/stdin/no-dash/_config.js
+++ b/test/cli/samples/stdin/no-dash/_config.js
@@ -1,4 +1,4 @@
 module.exports = {
 	description: 'uses stdin input when piping into Rollup without an input',
-	command: `shx mkdir -p _actual && shx echo "0 && fail() || console.log('PASS');" | rollup > _actual/out.js`
+	command: `echo "0 && fail() || console.log('PASS');" | rollup`
 };
diff --git a/test/cli/samples/stdin/no-dash/_expected/out.js b/test/cli/samples/stdin/no-dash/_expected.js
similarity index 100%
rename from test/cli/samples/stdin/no-dash/_expected/out.js
rename to test/cli/samples/stdin/no-dash/_expected.js
diff --git a/test/cli/samples/stdin/no-stdin-config-file/_config.js b/test/cli/samples/stdin/no-stdin-config-file/_config.js
index b1f23a423e3..889b9b67e36 100644
--- a/test/cli/samples/stdin/no-stdin-config-file/_config.js
+++ b/test/cli/samples/stdin/no-stdin-config-file/_config.js
@@ -1,4 +1,4 @@
 module.exports = {
 	description: 'allows using "-" as a regular file name via flag',
-	command: `shx echo "console.log('IGNORED');" | rollup -c --no-stdin`
+	command: `echo "console.log('IGNORED');" | rollup -c --no-stdin`
 };
diff --git a/test/cli/samples/stdin/no-stdin-tty/_config.js b/test/cli/samples/stdin/no-stdin-tty/_config.js
index 292c53e0719..9cb1b2b8822 100644
--- a/test/cli/samples/stdin/no-stdin-tty/_config.js
+++ b/test/cli/samples/stdin/no-stdin-tty/_config.js
@@ -2,7 +2,7 @@ const { assertStderrIncludes } = require('../../../../utils.js');
 
 module.exports = {
 	description: 'does not use input as stdin on TTY interfaces',
-	command: `shx echo "console.log('PASS');" | ./wrapper.js -f es`,
+	command: `echo "console.log('PASS');" | ./wrapper.js -f es`,
 	error(err) {
 		assertStderrIncludes(err.message, 'You must supply options.input to rollup');
 	}
diff --git a/test/cli/samples/stdin/self-import/_config.js b/test/cli/samples/stdin/self-import/_config.js
index 691426d2b24..ad167d46068 100644
--- a/test/cli/samples/stdin/self-import/_config.js
+++ b/test/cli/samples/stdin/self-import/_config.js
@@ -1,4 +1,4 @@
 module.exports = {
 	description: 'stdin input of code that imports a copy of itself',
-	command: `shx mkdir -p _actual && shx cat input.txt | rollup -f cjs --silent > _actual/out.js`
+	command: `shx mkdir -p _actual && shx cat input.txt | rollup -f cjs --silent`
 };
diff --git a/test/cli/samples/stdin/self-import/_expected/out.js b/test/cli/samples/stdin/self-import/_expected.js
similarity index 100%
rename from test/cli/samples/stdin/self-import/_expected/out.js
rename to test/cli/samples/stdin/self-import/_expected.js
diff --git a/test/cli/samples/stdin/with-dash/_config.js b/test/cli/samples/stdin/with-dash/_config.js
index 140aa43e535..8a162ae42f9 100644
--- a/test/cli/samples/stdin/with-dash/_config.js
+++ b/test/cli/samples/stdin/with-dash/_config.js
@@ -1,4 +1,4 @@
 module.exports = {
 	description: 'stdin input with dash on CLI',
-	command: `shx mkdir -p _actual && shx echo "0 && fail() || console.log('PASS');" | rollup - > _actual/out.js`
+	command: `echo "0 && fail() || console.log('PASS');" | rollup -`
 };
diff --git a/test/cli/samples/stdin/with-dash/_expected/out.js b/test/cli/samples/stdin/with-dash/_expected.js
similarity index 100%
rename from test/cli/samples/stdin/with-dash/_expected/out.js
rename to test/cli/samples/stdin/with-dash/_expected.js