diff --git a/Cargo.lock b/Cargo.lock
index 8b97008..f94ad01 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -99,6 +99,7 @@ name = "memona-plugin-ftp"
 version = "0.1.2"
 dependencies = [
  "memona-plugin-sdk",
+ "tokio",
 ]
 
 [[package]]
@@ -108,6 +109,12 @@ dependencies = [
  "wit-bindgen",
 ]
 
+[[package]]
+name = "pin-project-lite"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
+
 [[package]]
 name = "prettyplease"
 version = "0.3.0"
@@ -195,6 +202,27 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tokio"
+version = "1.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "202caea871b69668250d242070849eb495be178ed697a3e98aebce5bc81a0bed"
+dependencies = [
+ "pin-project-lite",
+ "tokio-macros",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "2.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78773a2a397f451582ce068015985c33193cf6dea8b74d2a639fe457b2f07b0e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.26"
diff --git a/Cargo.toml b/Cargo.toml
index de78c21..12289e4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,9 @@ crate-type = ["cdylib", "rlib"]
 [dependencies]
 memona-plugin-sdk = { path = "sdk" }
 
+[dev-dependencies]
+tokio = { version = "1", features = ["macros", "rt"] }
+
 [lints]
 workspace = true
 
diff --git a/src/control.rs b/src/control.rs
index 4cfbbba..30ee037 100644
--- a/src/control.rs
+++ b/src/control.rs
@@ -64,7 +64,9 @@ fn names_a_conflict(text: &str) -> bool {
     .collect();
   words.contains(&"exists")
     || words.contains(&"nonempty")
-    || words.windows(2).any(|pair| matches!(pair, ["not" | "non", "empty"]))
+    || words
+      .windows(2)
+      .any(|pair| matches!(pair, ["not" | "non", "empty"]))
 }
 
 /// What the first reply to a transfer command means. A transfer answers with
@@ -255,7 +257,10 @@ mod tests {
     ));
     // The same two conditions as other servers phrase them.
     assert!(matches!(
-      refusal(550, "550 Cannot create a file when that file already exists."),
+      refusal(
+        550,
+        "550 Cannot create a file when that file already exists."
+      ),
       Err(ErrorCode::Conflict)
     ));
     assert!(matches!(
diff --git a/src/lib.rs b/src/lib.rs
index 0d3be11..3eb4ad2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -31,10 +31,11 @@ struct Ftp;
 
 fn text(setting: Option<&Setting>) -> Option<String> {
   match setting {
-    Some(Setting::Text(value)) | Some(Setting::Secret(value)) => {
+    Some(Setting::Text(value)) => {
       let value = value.trim().to_owned();
       (!value.is_empty()).then_some(value)
     }
+    Some(Setting::Secret(value)) => Some(value.clone()),
     Some(Setting::Toggle(_)) | None => None,
   }
 }
@@ -394,3 +395,24 @@ impl Guest for Ftp {
 }
 
 memona_plugin_sdk::export!(Ftp);
+
+#[cfg(test)]
+mod tests {
+  use super::text;
+  use memona_plugin_sdk::Setting;
+
+  #[tokio::test]
+  async fn secret_credentials_preserve_significant_whitespace() {
+    for password in [" ftp fixture secret ", "   ", ""] {
+      assert_eq!(
+        text(Some(&Setting::Secret(password.to_owned()))),
+        Some(password.to_owned())
+      );
+    }
+    assert_eq!(
+      text(Some(&Setting::Text(" server.example ".to_owned()))),
+      Some("server.example".to_owned())
+    );
+    assert_eq!(text(Some(&Setting::Text("   ".to_owned()))), None);
+  }
+}
diff --git a/src/listing.rs b/src/listing.rs
index 607dc82..badf192 100644
--- a/src/listing.rs
+++ b/src/listing.rs
@@ -12,7 +12,6 @@ struct Facts<'a> {
 
 fn facts(line: &str) -> Option<Facts<'_>> {
   let (facts, name) = line.split_once(' ')?;
-  let name = name.trim();
   if name.is_empty() {
     return None;
   }
@@ -106,6 +105,21 @@ mod tests {
   use super::{machine_entry, machine_info, page};
   use memona_plugin_sdk::{EntryKind, ErrorCode};
 
+  #[tokio::test]
+  async fn listing_names_preserve_significant_whitespace()
+  -> Result<(), ErrorCode> {
+    let listing = b"type=file;size=1;  report.md \r\ntype=dir;  spaced folder \r\ntype=file;size=2;    \r\n";
+    let listed = page(listing, 0, 10)?;
+    let names: Vec<&str> = listed
+      .entries
+      .iter()
+      .map(|entry| entry.name.as_str())
+      .collect();
+    assert_eq!(names, [" report.md ", " spaced folder ", "   "]);
+    assert!(listed.cursor.is_none());
+    Ok(())
+  }
+
   #[test]
   fn reads_kind_and_size_and_skips_the_directory_itself()
   -> Result<(), &'static str> {