diff --git a/debian/changelog b/debian/changelog
index f578b75..1ef2cbe 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,7 @@
   * d/rules: build using leiningen. (Closes: #976415)
   * d/control: add a versioned dependency on tools-analyzer-jvm.
   * d/control: Standards-Version update to 4.5.1. No changes required.
+  * d/patches: add 0002 to revert upstream regression in testsuite.
 
  -- Louis-Philippe Véronneau <pollo@debian.org>  Mon, 07 Dec 2020 12:26:22 -0500
 
diff --git a/debian/patches/0002_Fix_Test_Timing.patch b/debian/patches/0002_Fix_Test_Timing.patch
new file mode 100644
index 0000000..d1ee211
--- /dev/null
+++ b/debian/patches/0002_Fix_Test_Timing.patch
@@ -0,0 +1,42 @@
+Revert upstream commit 094d239e0261263de3799bb6bd1cc33f06833d8b "make test less
+timing dependent", as it seems to intermittently create the following
+regression:
+
+  lein test :only clojure.core.async-test/ops-tests
+
+  FAIL in (ops-tests) (async_test.clj:304)
+  mult
+  expected: (= nil (a/poll! t-1))
+    actual: (not (= nil 2))
+
+  lein test :only clojure.core.async-test/ops-tests
+
+  FAIL in (ops-tests) (async_test.clj:305)
+  mult
+  expected: (= 1 (<!! t-2))
+    actual: (not (= 1 2))
+
+  lein test :only clojure.core.async-test/ops-tests
+
+  FAIL in (ops-tests) (async_test.clj:306)
+  mult
+  expected: (= 2 (<!! t-1))
+    actual: (not (= 2 3))
+Index: core-async-clojure/src/test/clojure/clojure/core/async_test.clj
+===================================================================
+--- core-async-clojure.orig/src/test/clojure/clojure/core/async_test.clj
++++ core-async-clojure/src/test/clojure/clojure/core/async_test.clj
+@@ -300,10 +300,10 @@
+       (tap m t-2)
+       (tap m t-3)
+       (close! t-3)
+-      (is (= 1 (<!! t-1)))
++      (is (= 1 (a/poll! t-1)))
+       (is (= nil (a/poll! t-1))) ;; t-2 hasn't taken yet
+-      (is (= 1 (<!! t-2)))
+-      (is (= 2 (<!! t-1))) ;; now available
++      (is (= 1 (a/poll! t-2)))
++      (is (= 2 (a/poll! t-1))) ;; now available
+       (is (= nil (a/poll! t-1)))))
+ 
+   (testing "mix"
diff --git a/debian/patches/series b/debian/patches/series
index f6005e4..ba4f89b 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1 +1,2 @@
 0001_Lein_Local.patch
+0002_Fix_Test_Timing.patch