diff --git a/src/source_distribution.rs b/src/source_distribution.rs
index 7842b2651..bfb0a7fc2 100644
--- a/src/source_distribution.rs
+++ b/src/source_distribution.rs
@@ -68,7 +68,7 @@ fn rewrite_cargo_toml(
         if let Some(table) = data.get_mut(dep_category).and_then(|x| x.as_table_mut()) {
             let workspace_deps = workspace_manifest
                 .get("workspace")
-                .and_then(|x| x.get(dep_category))
+                .and_then(|x| x.get("dependencies"))
                 .and_then(|x| x.as_table_like());
             let dep_names: Vec<_> = table.iter().map(|(key, _)| key.to_string()).collect();
             for dep_name in dep_names {
diff --git a/test-crates/workspace-inheritance/python/Cargo.toml b/test-crates/workspace-inheritance/python/Cargo.toml
index 396533358..6ac866903 100644
--- a/test-crates/workspace-inheritance/python/Cargo.toml
+++ b/test-crates/workspace-inheritance/python/Cargo.toml
@@ -17,6 +17,12 @@ workspace = true
 optional = true
 features = ["extra_traits"]
 
+[build-dependencies]
+cfg-if.workspace = true
+
+[dev-dependencies]
+cfg-if.workspace = true
+
 [dependencies.cfg-if]
 workspace = true
 optional = true