diff --git a/test/tests.zig b/test/tests.zig
index 5d173c44f5..4672359802 100644
--- a/test/tests.zig
+++ b/test/tests.zig
@@ -1512,7 +1512,7 @@ pub const TranslateCContext = struct {
             switch (term) {
                 .Exited => |code| {
                     if (code != 0) {
-                        warn("Compilation failed with exit code {}\n", .{code});
+                        warn("Compilation failed with exit code {}\n{}\n", .{ code, stderr_buf.toSliceConst() });
                         printInvocation(zig_args.toSliceConst());
                         return error.TestFailed;
                     }