diff --git a/gas/ChangeLog b/gas/ChangeLog
index 82e5580176a..ce1a97a7835 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-02  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-1.d: Add
+	--disassembler-options=force-thumb to objdump options.
+	* testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-2.d: Likewise.
+
 2017-11-01  James Bowman  <james.bowman@ftdichip.com>
 
 	* config/tc-ft32.c (md_assemble): Add relaxation reloc
diff --git a/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-1.d b/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-1.d
index 974cecccd74..55c696735af 100644
--- a/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-1.d
+++ b/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-1.d
@@ -1,5 +1,5 @@
 #source: copro-arm_v2plus-thumb_v6t2plus.s
-#objdump: -dr --prefix-addresses --show-raw-insn
+#objdump: -dr --prefix-addresses --show-raw-insn --disassembler-options=force-thumb
 #name: ARMv6T2 Thumb CoProcessor Instructions (1)
 #as: -march=armv6t2 -mthumb -mimplicit-it=always -EL
 
diff --git a/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-2.d b/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-2.d
index 4d5a8e7e768..e31536e1584 100644
--- a/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-2.d
+++ b/gas/testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-2.d
@@ -1,5 +1,5 @@
 #source: copro-arm_v5plus-thumb_v6t2plus.s
-#objdump: -dr --prefix-addresses --show-raw-insn
+#objdump: -dr --prefix-addresses --show-raw-insn --disassembler-options=force-thumb
 #name: ARMv6T2 Thumb CoProcessor Instructions (2)
 #as: -march=armv6t2 -mthumb -EL