diff --git a/NEWS b/NEWS
index 63ca84b5..6df203b5 100644
--- a/NEWS
+++ b/NEWS
@@ -56,6 +56,8 @@
    - In `sq pki certify`, change the certifier file parameter from a
      positional parameter to a named parameter, `--certifier-file`.
    - `sq pki certify` can now use the cert store and the key store.
+   - In `sq key adopt`, change the certificate file parameter from a
+     positional parameter to a named parameter, `--cert-file`.
 * Changes in 0.36.0
  - Missing
 * Changes in 0.35.0
diff --git a/src/cli/key.rs b/src/cli/key.rs
index e84208a1..b68c4903 100644
--- a/src/cli/key.rs
+++ b/src/cli/key.rs
@@ -1025,11 +1025,12 @@ pub struct AdoptCommand {
     )]
     pub allow_broken_crypto: bool,
     #[clap(
+        long,
         default_value_t = FileOrStdin::default(),
         value_name = "TARGET-KEY",
         help = "Add keys to TARGET-KEY or reads keys from stdin if omitted",
     )]
-    pub certificate: FileOrStdin,
+    pub cert_file: FileOrStdin,
     #[clap(
         default_value_t = FileOrStdout::default(),
         help = FileOrStdout::HELP_OPTIONAL,
diff --git a/src/commands/key/adopt.rs b/src/commands/key/adopt.rs
index c37f629d..4617f64b 100644
--- a/src/commands/key/adopt.rs
+++ b/src/commands/key/adopt.rs
@@ -25,7 +25,7 @@ use crate::decrypt_key;
 
 pub fn adopt(sq: Sq, command: cli::key::AdoptCommand) -> Result<()>
 {
-    let input = command.certificate.open()?;
+    let input = command.cert_file.open()?;
     let cert = Cert::from_buffered_reader(input)?;
     let mut wanted: Vec<(
         KeyHandle,
diff --git a/tests/common.rs b/tests/common.rs
index c1292167..4ae336c8 100644
--- a/tests/common.rs
+++ b/tests/common.rs
@@ -399,7 +399,7 @@ impl Sq {
             cmd.arg("--keyring").arg(k.as_ref());
         }
 
-        cmd.arg(target);
+        cmd.arg("--cert-file").arg(target);
 
         assert!(! keys.is_empty());
         for k in keys.into_iter() {