diff --git a/test/behavior/math.zig b/test/behavior/math.zig
index 7b280bca4e..ede6c7d645 100644
--- a/test/behavior/math.zig
+++ b/test/behavior/math.zig
@@ -1168,6 +1168,11 @@ test "remainder division" {
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
 
+    if (builtin.zig_backend == .stage1 and builtin.cpu.arch == .riscv64) {
+        // https://github.com/ziglang/zig/issues/12054
+        return error.SkipZigTest;
+    }
+
     comptime try remdiv(f16);
     comptime try remdiv(f32);
     comptime try remdiv(f64);
@@ -1199,6 +1204,11 @@ test "float remainder division using @rem" {
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
 
+    if (builtin.zig_backend == .stage1 and builtin.cpu.arch == .riscv64) {
+        // https://github.com/ziglang/zig/issues/12054
+        return error.SkipZigTest;
+    }
+
     comptime try frem(f16);
     comptime try frem(f32);
     comptime try frem(f64);
@@ -1241,6 +1251,11 @@ test "float modulo division using @mod" {
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
 
+    if (builtin.zig_backend == .stage1 and builtin.cpu.arch == .riscv64) {
+        // https://github.com/ziglang/zig/issues/12054
+        return error.SkipZigTest;
+    }
+
     comptime try fmod(f16);
     comptime try fmod(f32);
     comptime try fmod(f64);
@@ -1416,6 +1431,11 @@ test "@ceil f80" {
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
 
+    if (builtin.zig_backend == .stage1 and builtin.cpu.arch == .riscv64) {
+        // https://github.com/ziglang/zig/issues/12054
+        return error.SkipZigTest;
+    }
+
     try testCeil(f80, 12.0);
     comptime try testCeil(f80, 12.0);
 }
@@ -1427,6 +1447,11 @@ test "@ceil f128" {
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
 
+    if (builtin.zig_backend == .stage1 and builtin.cpu.arch == .riscv64) {
+        // https://github.com/ziglang/zig/issues/12054
+        return error.SkipZigTest;
+    }
+
     try testCeil(f128, 12.0);
     comptime try testCeil(f128, 12.0);
 }
@@ -1575,6 +1600,11 @@ test "NaN comparison" {
     if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
 
+    if (builtin.zig_backend == .stage1 and builtin.cpu.arch == .riscv64) {
+        // https://github.com/ziglang/zig/issues/12054
+        return error.SkipZigTest;
+    }
+
     try testNanEqNan(f16);
     try testNanEqNan(f32);
     try testNanEqNan(f64);