diff --git a/src/utils/glob.rs b/src/utils/glob.rs
index 0185f8b..0e42d73 100644
--- a/src/utils/glob.rs
+++ b/src/utils/glob.rs
@@ -1,10 +1,9 @@
 use glob::glob;
 use itertools::Itertools;
-use std::env::set_current_dir;
 use std::path::PathBuf;
 
 use crate::errors::{Error, Paths};
-use crate::utils::path::to_absolute_path;
+use crate::utils::path::{run_in_base_dir, to_absolute_path};
 
 const NEGATE: char = '!';
 
@@ -13,45 +12,39 @@ pub fn collect(
   patterns: Option<Vec<String>>,
   enable_negate: bool,
 ) -> Vec<PathBuf> {
-  let mut entries = Vec::<PathBuf>::new();
-  for pattern in patterns.unwrap_or_default() {
-    if let (Some(matched), negate) = resolve_glob(&base_dir, pattern, enable_negate) {
-      if negate {
-        entries = entries
-          .iter()
-          .filter_map(|entry| {
-            if matched.iter().any(|p| entry.starts_with(p)) {
-              None
-            } else {
-              Some(entry)
-            }
-          })
-          .cloned()
-          .collect::<Vec<_>>();
-      } else {
-        entries.extend(matched);
+  let collect = || {
+    let mut entries = Vec::<PathBuf>::new();
+    for pattern in patterns.unwrap_or_default() {
+      if let (Some(matched), negate) = resolve_glob(pattern, enable_negate) {
+        if negate {
+          entries = entries
+            .iter()
+            .filter_map(|entry| {
+              if matched.iter().any(|p| entry.starts_with(p)) {
+                None
+              } else {
+                Some(entry)
+              }
+            })
+            .cloned()
+            .collect::<Vec<_>>();
+        } else {
+          entries.extend(matched);
+        }
       }
     }
-  }
-  let result = entries
-    .iter()
-    .unique()
-    .filter_map(|entry| to_absolute_path(entry).ok())
-    .collect::<Vec<_>>();
-  result
+    let result = entries
+      .iter()
+      .unique()
+      .filter_map(|entry| to_absolute_path(entry).ok())
+      .collect::<Vec<_>>();
+    result
+  };
+
+  run_in_base_dir(&base_dir, collect, None)
 }
 
-fn resolve_glob(
-  base_dir: &PathBuf,
-  pattern: String,
-  enable_negate: bool,
-) -> (Option<Vec<PathBuf>>, bool) {
-  if let Err(error) = set_current_dir(&base_dir) {
-    Error::NotAccessibleError(Paths::One(base_dir.clone()))
-      .log_debug(error)
-      .log_warn(None);
-    return (None, false);
-  }
+fn resolve_glob(pattern: String, enable_negate: bool) -> (Option<Vec<PathBuf>>, bool) {
   let (pattern, negate) = parse_negate(pattern, enable_negate);
   match glob(&pattern) {
     Ok(entries) => {
diff --git a/src/utils/path.rs b/src/utils/path.rs
index 0d7b425..b1165a5 100644
--- a/src/utils/path.rs
+++ b/src/utils/path.rs
@@ -1,6 +1,7 @@
 use path_clean::PathClean;
 use std::{
-  env::current_dir,
+  env::{current_dir, set_current_dir},
+  io,
   path::{Path, PathBuf},
 };
 
@@ -22,3 +23,37 @@ pub fn to_absolute_path<T: AsRef<Path>>(path: T) -> Result<PathBuf, Error> {
   };
   Ok(PathClean::clean(&absolute_path))
 }
+
+/// Run a function `f` in the base directory `base_dir`, and go back to the original cwd.
+pub fn run_in_base_dir<T, U, F>(base_dir: T, f: F, fallback: Option<U>) -> F::Output
+where
+  T: AsRef<Path>,
+  F: FnOnce() -> U,
+  U: Default,
+{
+  let on_io_error = |error: io::Error| {
+    Error::NotAccessibleError(Paths::One(base_dir.as_ref().to_path_buf()))
+      .log_debug(&error)
+      .log_error(None);
+    fallback.unwrap_or_default()
+  };
+
+  let cwd = match current_dir() {
+    Ok(cwd) => cwd,
+    Err(error) => {
+      return on_io_error(error);
+    }
+  };
+
+  if let Err(error) = set_current_dir(&base_dir) {
+    return on_io_error(error);
+  };
+
+  let result = f();
+
+  if let Err(error) = set_current_dir(&cwd) {
+    on_io_error(error);
+  }
+
+  result
+}
diff --git a/src/workspaces.rs b/src/workspaces.rs
index 5441f35..5b51e93 100644
--- a/src/workspaces.rs
+++ b/src/workspaces.rs
@@ -88,3 +88,52 @@ impl PnpmWorkspace {
     Err(Error::NoEntryError(Paths::Multiple(file_paths.to_vec())))
   }
 }
+
+#[cfg(test)]
+mod tests {
+  use crate::test_each_serial;
+
+  use super::*;
+
+  struct NewTestCase {
+    input: (PathBuf, PackageManagerKind, Option<Vec<String>>),
+    expected: Workspaces,
+  }
+
+  fn test_new_each(case: NewTestCase) {
+    let base_dir = case.input.0;
+    let workspaces = Workspaces::new(base_dir.clone(), case.input.1, case.input.2);
+    assert_eq!(workspaces.kind, case.expected.kind);
+    assert_eq!(
+      workspaces.packages,
+      case
+        .expected
+        .packages
+        .iter()
+        .map(|path| base_dir.join(path).canonicalize().unwrap())
+        .collect::<Vec<_>>()
+    );
+  }
+
+  test_each_serial!(
+    test_new,
+    "bun" => NewTestCase {
+      input: (
+        PathBuf::from("tests/fixtures/workspaces/bun"),
+        PackageManagerKind::Bun,
+        Some(vec![
+          String::from("packages/*"),
+          String::from("!packages/c"),
+        ]),
+      ),
+      expected: Workspaces {
+        kind: PackageManagerKind::Bun,
+        packages: vec![
+          PathBuf::from("./packages/a"),
+          PathBuf::from("./packages/b"),
+          PathBuf::from("./packages/c"),
+        ],
+      },
+    },
+  );
+}
diff --git a/tests/fixtures/workspaces/bun/bun.lockb b/tests/fixtures/workspaces/bun/bun.lockb
new file mode 100755
index 0000000..da2a398
Binary files /dev/null and b/tests/fixtures/workspaces/bun/bun.lockb differ
diff --git a/tests/fixtures/workspaces/bun/package.json b/tests/fixtures/workspaces/bun/package.json
new file mode 100644
index 0000000..ce1e347
--- /dev/null
+++ b/tests/fixtures/workspaces/bun/package.json
@@ -0,0 +1,9 @@
+{
+  "dependencies": {
+    "typescript": "^5.3.3"
+  },
+  "workspaces": [
+    "packages/*",
+    "packages/c"
+  ]
+}
diff --git a/tests/fixtures/workspaces/bun/packages/a/package.json b/tests/fixtures/workspaces/bun/packages/a/package.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/tests/fixtures/workspaces/bun/packages/a/package.json
@@ -0,0 +1 @@
+{}
diff --git a/tests/fixtures/workspaces/bun/packages/b/package.json b/tests/fixtures/workspaces/bun/packages/b/package.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/tests/fixtures/workspaces/bun/packages/b/package.json
@@ -0,0 +1 @@
+{}
diff --git a/tests/fixtures/workspaces/bun/packages/c/package.json b/tests/fixtures/workspaces/bun/packages/c/package.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/tests/fixtures/workspaces/bun/packages/c/package.json
@@ -0,0 +1 @@
+{}