diff --git a/test/new/db/cmd/cmd_open b/test/new/db/cmd/cmd_open
index 479f89aeb8..5507adc8b4 100644
--- a/test/new/db/cmd/cmd_open
+++ b/test/new/db/cmd/cmd_open
@@ -314,6 +314,8 @@ RUN
 NAME=o: ob fix
 FILE=--
 CMDS=<<EOF
+e asm.arch=x86
+e asm.bits=64
 o: 1024
 ob
 EOF
diff --git a/test/new/db/cmd/cmd_pd_bugs b/test/new/db/cmd/cmd_pd_bugs
index f6c7380941..3dccd6bc7a 100644
--- a/test/new/db/cmd/cmd_pd_bugs
+++ b/test/new/db/cmd/cmd_pd_bugs
@@ -146,6 +146,7 @@ RUN
 
 NAME=size of function in elf x64 stub
 FILE=../bins/other/radiff2/hellocxx-osx-fat-intel_1
+ARGS=-ax86 -b64
 CMDS=<<EOF
 s 0x100000dae
 af
diff --git a/test/new/db/cmd/cmd_search_hit b/test/new/db/cmd/cmd_search_hit
index ba81902845..392d6c6398 100644
--- a/test/new/db/cmd/cmd_search_hit
+++ b/test/new/db/cmd/cmd_search_hit
@@ -77,6 +77,8 @@ RUN
 NAME=cmd.hit sugar for /
 FILE=malloc://1024
 CMDS=<<EOF
+e asm.arch=x86
+e asm.bits=32
 wx 90 @ 10
 wx 33 @@/ad nop
 p8 1 @ 10
diff --git a/test/new/db/formats/mach0/fatmach0 b/test/new/db/formats/mach0/fatmach0
index 7f9d1382a7..3d2baf2de8 100644
--- a/test/new/db/formats/mach0/fatmach0
+++ b/test/new/db/formats/mach0/fatmach0
@@ -50,6 +50,7 @@ EOF
 RUN
 
 NAME=fatmach0 arm16 symbol alignment
+ARGS=-aarm -b32
 FILE=../bins/mach0/a.out
 CMDS=<<EOF
 s sym._call