diff --git a/tonic-health/tests/bootstrap.rs b/tonic-health/tests/bootstrap.rs
index bb3241a..f02dd2e 100644
--- a/tonic-health/tests/bootstrap.rs
+++ b/tonic-health/tests/bootstrap.rs
@@ -13,7 +13,7 @@ fn bootstrap() {
         .build_client(true)
         .build_server(true)
         .build_transport(false)
-        .out_dir(format!("{}", out_dir.display()))
+        .out_dir(&out_dir)
         .compile(iface_files, dirs)
         .unwrap();
 
@@ -21,11 +21,9 @@ fn bootstrap() {
         .arg("diff")
         .arg("--exit-code")
         .arg("--")
-        .arg(format!("{}", out_dir.display()))
+        .arg(&out_dir)
         .status()
         .unwrap();
 
-    if !status.success() {
-        panic!("You should commit the protobuf files");
-    }
+    assert!(status.success(), "You should commit the protobuf files");
 }
diff --git a/tonic-reflection/tests/bootstrap.rs b/tonic-reflection/tests/bootstrap.rs
index 36fa8ea..66ee998 100644
--- a/tonic-reflection/tests/bootstrap.rs
+++ b/tonic-reflection/tests/bootstrap.rs
@@ -13,7 +13,7 @@ fn bootstrap() {
         .build_client(true)
         .build_server(true)
         .build_transport(false)
-        .out_dir(format!("{}", out_dir.display()))
+        .out_dir(&out_dir)
         .compile(iface_files, dirs)
         .unwrap();
 
@@ -21,11 +21,9 @@ fn bootstrap() {
         .arg("diff")
         .arg("--exit-code")
         .arg("--")
-        .arg(format!("{}", out_dir.display()))
+        .arg(&out_dir)
         .status()
         .unwrap();
 
-    if !status.success() {
-        panic!("You should commit the protobuf files");
-    }
+    assert!(status.success(), "You should commit the protobuf files");
 }
diff --git a/tonic-types/tests/bootstrap.rs b/tonic-types/tests/bootstrap.rs
index d586513..01c5dfd 100644
--- a/tonic-types/tests/bootstrap.rs
+++ b/tonic-types/tests/bootstrap.rs
@@ -10,7 +10,7 @@ fn bootstrap() {
         .join("generated");
 
     tonic_build::configure()
-        .out_dir(format!("{}", out_dir.display()))
+        .out_dir(&out_dir)
         .file_descriptor_set_path(out_dir.join("types.bin"))
         .compile(iface_files, dirs)
         .unwrap();
@@ -19,11 +19,9 @@ fn bootstrap() {
         .arg("diff")
         .arg("--exit-code")
         .arg("--")
-        .arg(format!("{}", out_dir.display()))
+        .arg(&out_dir)
         .status()
         .unwrap();
 
-    if !status.success() {
-        panic!("You should commit the protobuf files");
-    }
+    assert!(status.success(), "You should commit the protobuf files");
 }