diff --git a/tests/language/stack_trace/demangle_ctors_test.dart b/tests/language/stack_trace/demangle_ctors_test.dart
index 697ed127675..09b16d1be50 100644
--- a/tests/language/stack_trace/demangle_ctors_test.dart
+++ b/tests/language/stack_trace/demangle_ctors_test.dart
@@ -7,20 +7,24 @@
 import "package:expect/expect.dart";
 
 class SomeClass {
+  @pragma("wasm:never-inline")
   SomeClass.namedConstructor() {
     throw new Exception();
   }
 
+  @pragma("wasm:never-inline")
   SomeClass() {
     throw new Exception();
   }
 
+  @pragma("wasm:never-inline")
   factory SomeClass.useFactory() {
     throw new Exception();
   }
 }
 
 class OnlyHasFactory {
+  @pragma("wasm:never-inline")
   factory OnlyHasFactory() {
     throw new Exception();
   }
diff --git a/tests/language/stack_trace/full1_test.dart b/tests/language/stack_trace/full1_test.dart
index 0d32ab32e1b..67b89e9872b 100644
--- a/tests/language/stack_trace/full1_test.dart
+++ b/tests/language/stack_trace/full1_test.dart
@@ -13,16 +13,19 @@
 import "package:expect/expect.dart";
 
 @pragma("vm:entry-point") // Prevents obfuscation
+@pragma("wasm:never-inline")
 void func1() {
   throw new Exception("Test full stacktrace");
 }
 
 @pragma("vm:entry-point") // Prevents obfuscation
+@pragma("wasm:never-inline")
 void func2() {
   func1();
 }
 
 @pragma("vm:entry-point") // Prevents obfuscation
+@pragma("wasm:never-inline")
 void func3() {
   try {
     func2();
@@ -39,23 +42,27 @@ void func3() {
 }
 
 @pragma("vm:entry-point") // Prevents obfuscation
+@pragma("wasm:never-inline")
 int func4() {
   func3();
   return 1;
 }
 
 @pragma("vm:entry-point") // Prevents obfuscation
+@pragma("wasm:never-inline")
 int func5() {
   func4();
   return 1;
 }
 
 @pragma("vm:entry-point") // Prevents obfuscation
+@pragma("wasm:never-inline")
 int func6() {
   func5();
   return 1;
 }
 
+@pragma("wasm:never-inline")
 main() {
   var i = func6();
   Expect.equals(1, i);
diff --git a/tests/language/stack_trace/stack_trace_test.dart b/tests/language/stack_trace/stack_trace_test.dart
index b1e60a95d13..7c5fc62b797 100644
--- a/tests/language/stack_trace/stack_trace_test.dart
+++ b/tests/language/stack_trace/stack_trace_test.dart
@@ -89,6 +89,7 @@ class RethrowStacktraceTest {
 
   @pragma("vm:entry-point") // Prevent obfuscation
   @pragma("vm:never-inline") // Prevent inlining
+  @pragma("wasm:never-inline")
   issue12940() {
     throw "Progy";
   }