diff --git a/test/behavior/asm.zig b/test/behavior/asm.zig
index e9a01226b1..47a55931a6 100644
--- a/test/behavior/asm.zig
+++ b/test/behavior/asm.zig
@@ -23,6 +23,7 @@ test "module level assembly" {
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO WIP
 
     if (is_x86_64_linux) {
         try expect(this_is_my_alias() == 1234);
@@ -35,6 +36,7 @@ test "output constraint modifiers" {
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO WIP
 
     // This is only testing compilation.
     var a: u32 = 3;
@@ -56,6 +58,7 @@ test "alternative constraints" {
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO WIP
 
     // Make sure we allow commas as a separator for alternative constraints.
     var a: u32 = 3;
@@ -72,6 +75,7 @@ test "sized integer/float in asm input" {
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO WIP
 
     asm volatile (""
         :
@@ -121,6 +125,7 @@ test "struct/array/union types as input values" {
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO WIP
 
     asm volatile (""
         :