diff --git a/diffoscope.changes b/diffoscope.changes
index faf5b7a..a08b8a7 100644
--- a/diffoscope.changes
+++ b/diffoscope.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Mar 15 21:08:35 UTC 2021 - Sebastian Wagner <sebix+novell.com@sebix.at>
+
+- activate test_differences test, as it is fixed in openSUSE TW.
+- use fix-tests-libmix_differences.patch based on upstream patch and activate test_limix_differences tests.
+
 -------------------------------------------------------------------
 Fri Mar 12 08:03:39 UTC 2021 - Sebastian Wagner <sebix+novell.com@sebix.at>
 
diff --git a/diffoscope.spec b/diffoscope.spec
index b900ebc..badeb8b 100644
--- a/diffoscope.spec
+++ b/diffoscope.spec
@@ -26,6 +26,8 @@ URL:            https://diffoscope.org/
 Source0:        https://diffoscope.org/archive/diffoscope-%{version}.tar.bz2
 Source1:        https://diffoscope.org/archive/diffoscope-%{version}.tar.bz2.asc
 Source2:        diffoscope.keyring
+# PATCH-FIX-UPSTREAM fix-tests-libmix_differences.patch -- fixes test_libmix_differences after https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/244 https://salsa.debian.org/reproducible-builds/diffoscope/-/commit/fda75c731cd20383b15bcfc3326100b5ecd0787f.diff
+Patch0:         fix-tests-libmix_differences.patch
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 BuildRequires:  python3-base >= 3.7
@@ -112,6 +114,7 @@ debbindiff.
 %prep
 %setup -q
 sed -i '0,/#!\/usr\/bin\/env/ d' diffoscope/main.py
+%patch0 -p1
 
 %build
 %python3_build
@@ -134,10 +137,8 @@ if [ "$1" = 0 ] ; then
 fi
 
 %check
-# test_difference: https://bugzilla.opensuse.org/show_bug.cgi?id=1183143 (https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/243)
-# test_libmix_differences https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/244#note_231513
 # test_identification https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/98
-py.test-%{python3_bin_suffix} -k 'not test_difference and not test_identification and not test_libmix_differences'
+py.test-%{python3_bin_suffix} -k 'not test_identification'
 
 %files
 %doc README.rst
diff --git a/fix-tests-libmix_differences.patch b/fix-tests-libmix_differences.patch
new file mode 100644
index 0000000..42ee7a7
--- /dev/null
+++ b/fix-tests-libmix_differences.patch
@@ -0,0 +1,47 @@
+diff --git a/tests/comparators/test_elf.py b/tests/comparators/test_elf.py
+index 5e3658a5afff98f01f23aa0716b49229840890b4..82396313f450676d21bcd774396376435e24f57d 100644
+--- a/tests/comparators/test_elf.py
++++ b/tests/comparators/test_elf.py
+@@ -182,15 +182,22 @@ def test_libmix_differences(libmix_differences):
+     x86_o = x86_o.details[0]
+     assert x86_o.source1.startswith("objdump ")
+     assert src_c.source1.endswith(".c")
+-    x_obj = x_obj.details[0]
+-    assert x_obj.source1.startswith("readelf ")
+ 
+     # Content
+     assert "return42_or_3" in file_list.unified_diff
+     assert_diff(mach_o, "elfmix_mach_o_expected_diff")
+     assert_diff(x86_o, "elfmix_disassembly_expected_diff")
+     assert_diff(src_c, "elfmix_src_c_expected_diff")
+-    assert_diff(x_obj, "elfmix_x_obj_expected_diff")
++
++    x_obj = x_obj.details[0]
++    if x_obj.source1.startswith("readelf "):
++        assert_diff(x_obj, "elfmix_x_obj_expected_diff")
++    elif x_obj.source1.startswith("objdump "):
++        assert_diff(x_obj, "elfmix_x_obj_objdump_expected_diff")
++    else:
++        pytest.fail(
++            f"x_obj is neither readelf or objdump: {repr(x_obj.source1)}"
++        )
+ 
+ 
+ TEST_DBGSYM_DEB1_PATH = data("dbgsym/add/test-dbgsym_1_amd64.deb")
+diff --git a/tests/data/elfmix_x_obj_objdump_expected_diff b/tests/data/elfmix_x_obj_objdump_expected_diff
+new file mode 100644
+index 0000000000000000000000000000000000000000..1c0aace4c3be236262808f8d87336fcb68c3ec3e
+--- /dev/null
++++ b/tests/data/elfmix_x_obj_objdump_expected_diff
+@@ -0,0 +1,11 @@
++@@ -3,9 +3,9 @@
++ 
++ Disassembly of section .text:
++ 
++ 00000000 <return42_or_3>:
++ return42_or_3():
++ 	entry	a1, 32
++ 	mov.n	a7, a1
++-	movi.n	a2, 42
+++	movi.n	a2, 43
++ 	retw.n