diff --git a/src/cargo/util/toml_mut/dependency.rs b/src/cargo/util/toml_mut/dependency.rs
index cb375cc8d17e..d4f80e6d38eb 100644
--- a/src/cargo/util/toml_mut/dependency.rs
+++ b/src/cargo/util/toml_mut/dependency.rs
@@ -279,7 +279,7 @@ impl Dependency {
                     let src = WorkspaceSource::new();
                     src.into()
                 } else {
-                    let mut msg = format!("Unrecognized dependency source for `{key}`");
+                    let mut msg = format!("unrecognized dependency source for `{key}`");
                     if table.is_empty() {
                         msg.push_str(
                         ", expected a table with a `version`, `git`, `path`, or `workspace` key",
diff --git a/tests/testsuite/cargo_add/empty_dep_table/stderr.log b/tests/testsuite/cargo_add/empty_dep_table/stderr.log
index 00b1db5e3692..4608a06435fa 100644
--- a/tests/testsuite/cargo_add/empty_dep_table/stderr.log
+++ b/tests/testsuite/cargo_add/empty_dep_table/stderr.log
@@ -1 +1 @@
-error: Unrecognized dependency source for `your-face`, expected a table with a `version`, `git`, `path`, or `workspace` key
+error: unrecognized dependency source for `your-face`, expected a table with a `version`, `git`, `path`, or `workspace` key