diff --git a/tests/ui/auxiliary/proc_macro_attr.rs b/tests/ui/auxiliary/proc_macro_attr.rs
index e6626d57a772..01796d45f138 100644
--- a/tests/ui/auxiliary/proc_macro_attr.rs
+++ b/tests/ui/auxiliary/proc_macro_attr.rs
@@ -1,3 +1,4 @@
+// compile-flags: --emit=link
 // no-prefer-dynamic
 
 #![crate_type = "proc-macro"]
diff --git a/tests/ui/auxiliary/proc_macro_derive.rs b/tests/ui/auxiliary/proc_macro_derive.rs
index 05ffb55f6207..3df8be6c2323 100644
--- a/tests/ui/auxiliary/proc_macro_derive.rs
+++ b/tests/ui/auxiliary/proc_macro_derive.rs
@@ -1,3 +1,4 @@
+// compile-flags: --emit=link
 // no-prefer-dynamic
 
 #![crate_type = "proc-macro"]
diff --git a/tests/ui/crashes/auxiliary/proc_macro_crash.rs b/tests/ui/crashes/auxiliary/proc_macro_crash.rs
index 086548e58ed6..619d11cefc46 100644
--- a/tests/ui/crashes/auxiliary/proc_macro_crash.rs
+++ b/tests/ui/crashes/auxiliary/proc_macro_crash.rs
@@ -1,3 +1,4 @@
+// compile-flags: --emit=link
 // no-prefer-dynamic
 // ^ compiletest by default builds all aux files as dylibs, but we don't want that for proc-macro
 // crates. If we don't set this, compiletest will override the `crate_type` attribute below and