diff --git a/src/cargo/util/toml/mod.rs b/src/cargo/util/toml/mod.rs
index 4e1426147e2..2f88478a059 100644
--- a/src/cargo/util/toml/mod.rs
+++ b/src/cargo/util/toml/mod.rs
@@ -12,7 +12,6 @@ use cargo_util::paths;
 use itertools::Itertools;
 use lazycell::LazyCell;
 use semver::{self, VersionReq};
-use serde::de::IntoDeserializer as _;
 use serde::de::{self, Unexpected};
 use serde::ser;
 use serde::{Deserialize, Serialize};
@@ -99,15 +98,9 @@ fn read_manifest_from_str(
 ) -> CargoResult<(EitherManifest, Vec<PathBuf>)> {
     let package_root = manifest_file.parent().unwrap();
 
-    let toml = {
-        let pretty_filename = manifest_file
-            .strip_prefix(config.cwd())
-            .unwrap_or(manifest_file);
-        parse_document(contents, pretty_filename, config)?
-    };
-
     let mut unused = BTreeSet::new();
-    let manifest: TomlManifest = serde_ignored::deserialize(toml.into_deserializer(), |path| {
+    let deserializer = toml::de::Deserializer::new(contents);
+    let manifest: TomlManifest = serde_ignored::deserialize(deserializer, |path| {
         let mut key = String::new();
         stringify(&mut key, &path);
         unused.insert(key);
diff --git a/tests/testsuite/bad_config.rs b/tests/testsuite/bad_config.rs
index ab5ed0f2373..fe802eed059 100644
--- a/tests/testsuite/bad_config.rs
+++ b/tests/testsuite/bad_config.rs
@@ -1285,8 +1285,11 @@ fn bad_dependency() {
 error: failed to parse manifest at `[..]`
 
 Caused by:
+  TOML parse error at line 8, column 23
+    |
+  8 |                 bar = 3
+    |                       ^
   invalid type: integer `3`, expected a version string like [..]
-  in `dependencies.bar`
 ",
         )
         .run();
@@ -1317,8 +1320,11 @@ fn bad_debuginfo() {
 error: failed to parse manifest [..]
 
 Caused by:
+  TOML parse error at line 8, column 25
+    |
+  8 |                 debug = 'a'
+    |                         ^^^
   invalid value: string \"a\", expected a boolean, 0, 1, 2, \"line-tables-only\", or \"line-directives-only\"
-  in `profile.dev.debug`
 ",
         )
         .run();
@@ -1349,8 +1355,11 @@ fn bad_debuginfo2() {
 error: failed to parse manifest at `[..]`
 
 Caused by:
+  TOML parse error at line 8, column 25
+    |
+  8 |                 debug = 3.6
+    |                         ^^^
   invalid type: floating point `3.6`, expected a boolean, 0, 1, 2, \"line-tables-only\", or \"line-directives-only\"
-  in `profile.dev.debug`
 ",
         )
         .run();
@@ -1379,8 +1388,11 @@ fn bad_opt_level() {
 error: failed to parse manifest at `[..]`
 
 Caused by:
+  TOML parse error at line 6, column 25
+    |
+  6 |                 build = 3
+    |                         ^
   expected a boolean or a string
-  in `package.build`
 ",
         )
         .run();
diff --git a/tests/testsuite/build.rs b/tests/testsuite/build.rs
index 6775cb1dea0..3c650ca5213 100644
--- a/tests/testsuite/build.rs
+++ b/tests/testsuite/build.rs
@@ -340,8 +340,11 @@ fn cargo_compile_with_invalid_version() {
 [ERROR] failed to parse manifest at `[..]`
 
 Caused by:
+  TOML parse error at line 4, column 19
+    |
+  4 |         version = \"1.0\"
+    |                   ^^^^^
   unexpected end of input while parsing minor version number
-  in `package.version`
 ",
         )
         .run();
diff --git a/tests/testsuite/cargo_features.rs b/tests/testsuite/cargo_features.rs
index 5f3a96eff5b..cf7ef019044 100644
--- a/tests/testsuite/cargo_features.rs
+++ b/tests/testsuite/cargo_features.rs
@@ -676,8 +676,11 @@ fn wrong_position() {
 error: failed to parse manifest at [..]
 
 Caused by:
+  TOML parse error at line 5, column 34
+    |
+  5 |                 cargo-features = [\"test-dummy-unstable\"]
+    |                                  ^^^^^^^^^^^^^^^^^^^^^^^
   the field `cargo-features` should be set at the top of Cargo.toml before any tables
-  in `package.cargo-features`
 ",
         )
         .run();
diff --git a/tests/testsuite/inheritable_workspace_fields.rs b/tests/testsuite/inheritable_workspace_fields.rs
index 0eb42542de9..47437102a59 100644
--- a/tests/testsuite/inheritable_workspace_fields.rs
+++ b/tests/testsuite/inheritable_workspace_fields.rs
@@ -1234,8 +1234,11 @@ fn error_workspace_false() {
 [ERROR] failed to parse manifest at `[CWD]/Cargo.toml`
 
 Caused by:
+  TOML parse error at line 7, column 41
+    |
+  7 |             description = { workspace = false }
+    |                                         ^^^^^
   `workspace` cannot be false
-  in `package.description.workspace`
 ",
         )
         .run();
diff --git a/tests/testsuite/metadata.rs b/tests/testsuite/metadata.rs
index ac2cec39661..fbead4dea97 100644
--- a/tests/testsuite/metadata.rs
+++ b/tests/testsuite/metadata.rs
@@ -1821,8 +1821,11 @@ fn cargo_metadata_with_invalid_authors_field() {
             r#"[ERROR] failed to parse manifest at `[..]`
 
 Caused by:
-  invalid type: string "", expected a vector of strings or workspace
-  in `package.authors`"#,
+  TOML parse error at line 3, column 27
+    |
+  3 |                 authors = ""
+    |                           ^^
+  invalid type: string "", expected a vector of strings or workspace"#,
         )
         .run();
 }
@@ -1846,8 +1849,11 @@ fn cargo_metadata_with_invalid_version_field() {
             r#"[ERROR] failed to parse manifest at `[..]`
 
 Caused by:
-  invalid type: integer `1`, expected SemVer version
-  in `package.version`"#,
+  TOML parse error at line 3, column 27
+    |
+  3 |                 version = 1
+    |                           ^
+  invalid type: integer `1`, expected SemVer version"#,
         )
         .run();
 }
@@ -1871,8 +1877,11 @@ fn cargo_metadata_with_invalid_publish_field() {
             r#"[ERROR] failed to parse manifest at `[..]`
 
 Caused by:
-  invalid type: string "foo", expected a boolean, a vector of strings, or workspace
-  in `package.publish`"#,
+  TOML parse error at line 3, column 27
+    |
+  3 |                 publish = "foo"
+    |                           ^^^^^
+  invalid type: string "foo", expected a boolean, a vector of strings, or workspace"#,
         )
         .run();
 }