diff --git a/patches/0018-test-Force-single-thread-mode.patch b/patches/0018-test-Force-single-thread-mode.patch
new file mode 100644
index 00000000000..19cead46ff7
--- /dev/null
+++ b/patches/0018-test-Force-single-thread-mode.patch
@@ -0,0 +1,34 @@
+From e275a6ac96bedda2d57296914f2bb736e1e4154c Mon Sep 17 00:00:00 2001
+From: bjorn3 <bjorn3@users.noreply.github.com>
+Date: Fri, 9 Aug 2019 13:16:55 +0200
+Subject: [PATCH] [test] Force single thread mode
+
+---
+ src/libtest/lib.rs | 11 +----------
+ 1 file changed, 1 insertion(+), 10 deletions(-)
+
+diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
+index 8d74d9a..c7a3c23 100644
+--- a/src/libtest/lib.rs
++++ b/src/libtest/lib.rs
+@@ -1419,16 +1419,7 @@ pub fn run_test(
+                 .unwrap();
+         };
+ 
+-        // If the platform is single-threaded we're just going to run
+-        // the test synchronously, regardless of the concurrency
+-        // level.
+-        let supports_threads = !cfg!(target_os = "emscripten") && !cfg!(target_arch = "wasm32");
+-        if concurrency == Concurrent::Yes && supports_threads {
+-            let cfg = thread::Builder::new().name(name.as_slice().to_owned());
+-            cfg.spawn(runtest).unwrap();
+-        } else {
+-            runtest();
+-        }
++        runtest();
+     }
+ 
+     match testfn {
+-- 
+2.20.1
+