diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/in/Cargo.toml b/tests/testsuite/cargo_new/add_members_to_non_workspace/in/Cargo.toml
new file mode 100644
index 000000000..878c67291
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/in/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/in/src/main.rs b/tests/testsuite/cargo_new/add_members_to_non_workspace/in/src/main.rs
new file mode 100644
index 000000000..f328e4d9d
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/in/src/main.rs
@@ -0,0 +1 @@
+fn main() {}
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/mod.rs b/tests/testsuite/cargo_new/add_members_to_non_workspace/mod.rs
new file mode 100644
index 000000000..c70b97ca7
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/mod.rs
@@ -0,0 +1,22 @@
+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::curr_dir;
+use cargo_test_support::CargoCommand;
+use cargo_test_support::Project;
+
+#[cargo_test]
+fn case() {
+    let project = Project::from_template(curr_dir!().join("in"));
+    let project_root = project.root();
+    let cwd = &project_root;
+
+    snapbox::cmd::Command::cargo_ui()
+        .arg("new")
+        .args(["bar", "--lib"])
+        .current_dir(cwd)
+        .assert()
+        .success()
+        .stdout_matches_path(curr_dir!().join("stdout.log"))
+        .stderr_matches_path(curr_dir!().join("stderr.log"));
+
+    assert_ui().subset_matches(curr_dir!().join("out"), &project_root);
+}
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/out/Cargo.toml b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/Cargo.toml
new file mode 100644
index 000000000..74a8b782a
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/Cargo.toml
@@ -0,0 +1,7 @@
+workspace = { members = ["bar"] }
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/out/bar/Cargo.toml b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/bar/Cargo.toml
new file mode 100644
index 000000000..fe23452f3
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/bar/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "bar"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/out/bar/src/lib.rs b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/bar/src/lib.rs
new file mode 100644
index 000000000..7d12d9af8
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/bar/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/out/src/main.rs b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/src/main.rs
new file mode 100644
index 000000000..f328e4d9d
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/out/src/main.rs
@@ -0,0 +1 @@
+fn main() {}
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/stderr.log b/tests/testsuite/cargo_new/add_members_to_non_workspace/stderr.log
new file mode 100644
index 000000000..25556c950
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_non_workspace/stderr.log
@@ -0,0 +1,2 @@
+    Creating library `bar` package
+note: see more `Cargo.toml` keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/tests/testsuite/cargo_new/add_members_to_non_workspace/stdout.log b/tests/testsuite/cargo_new/add_members_to_non_workspace/stdout.log
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/in/Cargo.toml b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/in/Cargo.toml
new file mode 100644
index 000000000..005ee0dc4
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/in/Cargo.toml
@@ -0,0 +1,6 @@
+[workspace]
+
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
\ No newline at end of file
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/in/src/main.rs b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/in/src/main.rs
new file mode 100644
index 000000000..f328e4d9d
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/in/src/main.rs
@@ -0,0 +1 @@
+fn main() {}
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/mod.rs b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/mod.rs
new file mode 100644
index 000000000..c70b97ca7
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/mod.rs
@@ -0,0 +1,22 @@
+use cargo_test_support::compare::assert_ui;
+use cargo_test_support::curr_dir;
+use cargo_test_support::CargoCommand;
+use cargo_test_support::Project;
+
+#[cargo_test]
+fn case() {
+    let project = Project::from_template(curr_dir!().join("in"));
+    let project_root = project.root();
+    let cwd = &project_root;
+
+    snapbox::cmd::Command::cargo_ui()
+        .arg("new")
+        .args(["bar", "--lib"])
+        .current_dir(cwd)
+        .assert()
+        .success()
+        .stdout_matches_path(curr_dir!().join("stdout.log"))
+        .stderr_matches_path(curr_dir!().join("stderr.log"));
+
+    assert_ui().subset_matches(curr_dir!().join("out"), &project_root);
+}
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/Cargo.toml b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/Cargo.toml
new file mode 100644
index 000000000..8af198f51
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/Cargo.toml
@@ -0,0 +1,7 @@
+[workspace]
+members = ["bar"]
+
+[package]
+name = "foo"
+version = "0.1.0"
+edition = "2021"
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/bar/Cargo.toml b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/bar/Cargo.toml
new file mode 100644
index 000000000..fe23452f3
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/bar/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "bar"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/bar/src/lib.rs b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/bar/src/lib.rs
new file mode 100644
index 000000000..7d12d9af8
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/bar/src/lib.rs
@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/src/main.rs b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/src/main.rs
new file mode 100644
index 000000000..f328e4d9d
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/out/src/main.rs
@@ -0,0 +1 @@
+fn main() {}
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/stderr.log b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/stderr.log
new file mode 100644
index 000000000..25556c950
--- /dev/null
+++ b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/stderr.log
@@ -0,0 +1,2 @@
+    Creating library `bar` package
+note: see more `Cargo.toml` keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/tests/testsuite/cargo_new/add_members_to_workspace_without_members/stdout.log b/tests/testsuite/cargo_new/add_members_to_workspace_without_members/stdout.log
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/testsuite/cargo_new/mod.rs b/tests/testsuite/cargo_new/mod.rs
index 806bd2ec3..ca8ee0f9c 100644
--- a/tests/testsuite/cargo_new/mod.rs
+++ b/tests/testsuite/cargo_new/mod.rs
@@ -1,9 +1,11 @@
+mod add_members_to_non_workspace;
 mod add_members_to_workspace_format_previous_items;
 mod add_members_to_workspace_format_sorted;
 mod add_members_to_workspace_with_absolute_package_path;
 mod add_members_to_workspace_with_empty_members;
 mod add_members_to_workspace_with_exclude_list;
 mod add_members_to_workspace_with_members_glob;
+mod add_members_to_workspace_without_members;
 mod empty_name;
 mod help;
 mod inherit_workspace_lints;