diff --git a/src/lib/decrypt_transform.ts b/src/lib/decrypt_transform.ts
index 525c67c..5cd2ad3 100644
--- a/src/lib/decrypt_transform.ts
+++ b/src/lib/decrypt_transform.ts
@@ -24,8 +24,8 @@ export class DecryptTransform extends Transform {
 
   override _transform(chunk: any, _encoding: BufferEncoding, callback: TransformCallback) {
     let data = chunk as Buffer
-    if (this.inputEncoding && this.inputEncoding !== 'binary') {
-      data = Buffer.from(data.toString().trim(), this.inputEncoding)
+    if (this.inputEncoding) {
+      data = Buffer.from(data.toString(), this.inputEncoding)
     }
     if (!this.decipher) {
       // Unpackage the combined iv + encrypted message.
diff --git a/test/ssh_agent_cli.spec.ts b/test/ssh_agent_cli.spec.ts
index f6cf369..3aa053b 100644
--- a/test/ssh_agent_cli.spec.ts
+++ b/test/ssh_agent_cli.spec.ts
@@ -4,8 +4,9 @@ import { execSync } from 'child_process'
 
 describe('ssh-crypt cli tests', () => {
   it('should show help', () => {
-    const output = execSync(`npm exec -- tsx src/cli.ts -h`, {
+    const output = execSync('npm exec -- tsx src/cli.ts -h', {
       encoding: 'utf8',
+      stdio: 'pipe',
     })
     const text =
       'Usage: ssh-crypt [options] <command>\n' +
@@ -30,9 +31,11 @@ describe('ssh-crypt cli tests', () => {
   })
   it('should encrypt', () => {
     const output = execSync(
-      `echo 'Lorem ipsum dolor' | npm exec -- tsx src/cli.ts -k key_ed25519 -s not_a_secret --encryptEncoding hex encrypt`,
+      'npm exec -- tsx src/cli.ts -k key_ed25519 -s not_a_secret --encryptEncoding hex encrypt',
       {
         encoding: 'ascii',
+        input: 'Lorem ipsum dolor',
+        stdio: 'pipe',
       },
     )
     chai.assert.strictEqual(output.length, 96)
@@ -41,9 +44,11 @@ describe('ssh-crypt cli tests', () => {
     const data =
       'ecfd6bb57f4891ba7226886e90d2eb848022a495b15ffd91ffe760bca5605f9062c305ee14226d9daf7faa58460c8f50'
     const output = execSync(
-      `echo '${data}' | npm exec -- tsx src/cli.ts -k key_rsa -s not_a_secret --decryptEncoding hex decrypt`,
+      'npm exec -- tsx src/cli.ts -k key_rsa -s not_a_secret --decryptEncoding hex decrypt',
       {
         encoding: 'utf8',
+        input: data,
+        stdio: 'pipe',
       },
     )
     chai.assert.strictEqual(output, 'Lorem ipsum dolor')
@@ -53,9 +58,10 @@ describe('ssh-crypt cli tests', () => {
       'ecfd6bb57f4891ba7226886e90d2eb848022a495b15ffd91ffe760bca5605f9062c305ee14226d9daf7faa58460c8f50'
     chai
       .expect(() =>
-        execSync(
-          `echo '${data}' | npm exec -- tsx src/cli.ts -k key_rsa -s wrong_secret --decryptEncoding hex decrypt`,
-        ),
+        execSync('npm exec -- tsx src/cli.ts -k key_rsa -s wrong_secret --decryptEncoding hex decrypt', {
+          input: data,
+          stdio: 'pipe',
+        }),
       )
       .to.throw(/bad secret or key, can't decrypt/iu)
   })