diff --git a/lldb/test/API/commands/expression/import-std-module/forward_decl_from_module/TestForwardDeclFromStdModule.py b/lldb/test/API/commands/expression/import-std-module/forward_decl_from_module/TestForwardDeclFromStdModule.py
--- a/lldb/test/API/commands/expression/import-std-module/forward_decl_from_module/TestForwardDeclFromStdModule.py
+++ b/lldb/test/API/commands/expression/import-std-module/forward_decl_from_module/TestForwardDeclFromStdModule.py
@@ -37,4 +37,4 @@
         # Both `std::vector` and the type of the member have forward
         # declarations before their definitions.
         self.expect("expr --raw -- v",
-                    substrs=['(std::__1::vector<int>) $0 = {', 'f = nullptr', '}'])
+                    patterns=[r'\(std::__[^:]*::vector<int>\) \$0 = {', 'f = nullptr', '}'])