diff --git a/cranelift/filetests/filetests/runtests/simd-uwidenhigh.clif b/cranelift/filetests/filetests/runtests/simd-uwidenhigh.clif
index d9e4b2b0e0..281e63ac02 100644
--- a/cranelift/filetests/filetests/runtests/simd-uwidenhigh.clif
+++ b/cranelift/filetests/filetests/runtests/simd-uwidenhigh.clif
@@ -2,7 +2,7 @@ test interpret
 test run
 target aarch64
 set enable_simd
-target x86_64
+target x86_64 machinst
 
 function %uwidenhigh_i8x16(i8x16) -> i16x8 {
 block0(v0: i8x16):
diff --git a/cranelift/filetests/filetests/runtests/simd-uwidenlow.clif b/cranelift/filetests/filetests/runtests/simd-uwidenlow.clif
index 6acf4e1a2b..8b865a305b 100644
--- a/cranelift/filetests/filetests/runtests/simd-uwidenlow.clif
+++ b/cranelift/filetests/filetests/runtests/simd-uwidenlow.clif
@@ -2,7 +2,7 @@ test interpret
 test run
 target aarch64
 set enable_simd
-target x86_64
+target x86_64 machinst
 
 function %uwidenlow_i8x16(i8x16) -> i16x8 {
 block0(v0: i8x16):