diff --git a/lib/std/fmt/float.zig b/lib/std/fmt/float.zig
index 44a71f90f42c47b608d6db65b1b7a59243680507..2d6dccf25b5b6c7cbdae3506d5aae90ff8899b45 100644
--- a/lib/std/fmt/float.zig
+++ b/lib/std/fmt/float.zig
@@ -1646,6 +1646,8 @@ test "format f64" {
 }
 
 test "format f80" {
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+
     try check(f80, 0.0, "0e0");
     try check(f80, -0.0, "-0e0");
     try check(f80, 1.0, "1e0");
diff --git a/test/behavior/vector.zig b/test/behavior/vector.zig
index 69998aeb6963234c6d9611d95d70a197b06f0a86..a01fc0a218dac64e24d7c43637d9dfcae43fe8f3 100644
--- a/test/behavior/vector.zig
+++ b/test/behavior/vector.zig
@@ -748,6 +748,7 @@ test "vector reduce operation" {
     if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_c and builtin.cpu.arch.isArm()) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_riscv64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_llvm and builtin.cpu.arch.isPowerPC()) return error.SkipZigTest; // https://github.com/llvm/llvm-project/issues/195562
 
     const S = struct {
         fn testReduce(comptime op: std.builtin.ReduceOp, x: anytype, expected: anytype) !void {
diff --git a/test/tests.zig b/test/tests.zig
index ce65c75c63b4bcd40c45b316270740a88975458f..5ee5c3f3e2b4b7b2a37363d551385ceba8a12ff0 100644
--- a/test/tests.zig
+++ b/test/tests.zig
@@ -2612,6 +2612,10 @@ fn addOneModuleTest(
     if (mem.eql(u8, options.name, "compiler-rt") or mem.eql(u8, options.name, "libc")) {
         these_tests.root_module.stack_protector = false;
     }
+    // https://github.com/llvm/llvm-project/issues/195561
+    if (target.cpu.arch.isPowerPC()) {
+        these_tests.root_module.stack_protector = false;
+    }
     if (options.build_options) |build_options| {
         these_tests.root_module.addOptions("build_options", build_options);
     }
@@ -2857,6 +2861,11 @@ pub fn addCAbiTests(b: *std.Build, options: CAbiTestOptions) *Step {
                 .max_rss = options.max_rss,
             });
 
+            // https://github.com/llvm/llvm-project/issues/195561
+            if (target.cpu.arch.isPowerPC()) {
+                test_step.root_module.stack_protector = false;
+            }
+
             // This test is intentionally trying to check if the external ABI is
             // done properly. LTO would be a hindrance to this.
             test_step.lto = .none;