diff --git a/debian/changelog b/debian/changelog
index 7f461a40c6..f2904a726a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 rustc (1.47.0~beta.2+dfsg1-1~exp2) UNRELEASED; urgency=medium
 
   * Update to LLVM 11.
+  * Ignore more tests on big-endian.
 
  -- Ximin Luo <infinity0@debian.org>  Thu, 01 Oct 2020 17:25:07 +0100
 
diff --git a/debian/patches/series b/debian/patches/series
index 2d9a47b24d..ebae6bad9d 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -5,6 +5,7 @@ u-reproducible-build.patch
 u-make-tests-work-without-rpath.patch
 u-tests-ignore-arm.patch
 u-mips-fixes.diff
+u-ignore-endian-big.patch
 #u-allow-system-compiler-rt.patch
 
 # not forwarded, or forwarded but unlikely to be merged
diff --git a/debian/patches/u-ignore-endian-big.patch b/debian/patches/u-ignore-endian-big.patch
new file mode 100644
index 0000000000..08bdbce971
--- /dev/null
+++ b/debian/patches/u-ignore-endian-big.patch
@@ -0,0 +1,60 @@
+diff --git a/src/test/mir-opt/const_prop/checked_add.rs b/src/test/mir-opt/const_prop/checked_add.rs
+index 08d59b6fb..4f1bb6139 100644
+--- a/src/test/mir-opt/const_prop/checked_add.rs
++++ b/src/test/mir-opt/const_prop/checked_add.rs
+@@ -1,4 +1,5 @@
+ // compile-flags: -C overflow-checks=on
++// ignore-endian-big
+ 
+ // EMIT_MIR checked_add.main.ConstProp.diff
+ fn main() {
+diff --git a/src/test/mir-opt/const_prop/mutable_variable_aggregate.rs b/src/test/mir-opt/const_prop/mutable_variable_aggregate.rs
+index e0b4b77ba..bbac22782 100644
+--- a/src/test/mir-opt/const_prop/mutable_variable_aggregate.rs
++++ b/src/test/mir-opt/const_prop/mutable_variable_aggregate.rs
+@@ -1,4 +1,5 @@
+ // compile-flags: -O
++// ignore-endian-big
+ 
+ // EMIT_MIR mutable_variable_aggregate.main.ConstProp.diff
+ fn main() {
+diff --git a/src/test/mir-opt/const_prop/mutable_variable_no_prop.rs b/src/test/mir-opt/const_prop/mutable_variable_no_prop.rs
+index 4126fb3c6..3e8545e5c 100644
+--- a/src/test/mir-opt/const_prop/mutable_variable_no_prop.rs
++++ b/src/test/mir-opt/const_prop/mutable_variable_no_prop.rs
+@@ -1,4 +1,5 @@
+ // compile-flags: -O
++// ignore-endian-big
+ 
+ static mut STATIC: u32 = 42;
+ 
+diff --git a/src/test/mir-opt/const_prop/optimizes_into_variable.rs b/src/test/mir-opt/const_prop/optimizes_into_variable.rs
+index 17265b7eb..ce1c10312 100644
+--- a/src/test/mir-opt/const_prop/optimizes_into_variable.rs
++++ b/src/test/mir-opt/const_prop/optimizes_into_variable.rs
+@@ -1,4 +1,5 @@
+ // compile-flags: -C overflow-checks=on
++// ignore-endian-big
+ 
+ struct Point {
+     x: u32,
+diff --git a/src/test/mir-opt/const_prop/return_place.rs b/src/test/mir-opt/const_prop/return_place.rs
+index 06a853696..f28c1b89f 100644
+--- a/src/test/mir-opt/const_prop/return_place.rs
++++ b/src/test/mir-opt/const_prop/return_place.rs
+@@ -1,4 +1,5 @@
+ // compile-flags: -C overflow-checks=on
++// ignore-endian-big
+ 
+ // EMIT_MIR return_place.add.ConstProp.diff
+ // EMIT_MIR return_place.add.PreCodegen.before.mir
+diff --git a/src/test/mir-opt/const_prop/tuple_literal_propagation.rs b/src/test/mir-opt/const_prop/tuple_literal_propagation.rs
+index e644baec4..049052ad0 100644
+--- a/src/test/mir-opt/const_prop/tuple_literal_propagation.rs
++++ b/src/test/mir-opt/const_prop/tuple_literal_propagation.rs
+@@ -1,3 +1,5 @@
++// ignore-endian-big
++
+ // EMIT_MIR tuple_literal_propagation.main.ConstProp.diff
+ fn main() {
+     let x = (1, 2);