diff --git a/tests/tests.rs b/tests/tests.rs
index 6730a28..91572bc 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -60,6 +60,8 @@ fn server() {
         .expect("cannot run curl");
 
     srv.kill().unwrap();
+    srv.wait()
+        .expect("failed to wait on server process");
 
     if !output.status.success() {
         let version_stdout = Command::new("curl")
@@ -91,6 +93,8 @@ fn custom_ca_store() {
         .expect("cannot run client example");
 
     srv.kill().unwrap();
+    srv.wait()
+        .expect("failed to wait on server process");
 
     if !rc.status.success() {
         assert_eq!(String::from_utf8_lossy(&rc.stdout), "");