diff --git a/go/loader/loader_test.go b/go/loader/loader_test.go
index 5fa3254..e68405a 100644
--- a/go/loader/loader_test.go
+++ b/go/loader/loader_test.go
@@ -645,8 +645,11 @@
 	for pkg, info := range prog.AllPackages {
 		switch pkg.Path() {
 		case "a":
-			if !hasError(info.Errors, "cannot convert false") {
-				t.Errorf("a.Errors = %v, want bool conversion (type) error", info.Errors)
+			// The match below is unfortunately vague, because in go1.16 the error
+			// message in go/types changed from "cannot convert ..." to "cannot use
+			// ... as ... in assignment".
+			if !hasError(info.Errors, "cannot") {
+				t.Errorf("a.Errors = %v, want bool assignment (type) error", info.Errors)
 			}
 			if !hasError(info.Errors, "could not import c") {
 				t.Errorf("a.Errors = %v, want import (loader) error", info.Errors)
@@ -659,7 +662,7 @@
 	}
 
 	// Check errors reported via error handler.
-	if !hasError(allErrors, "cannot convert false") ||
+	if !hasError(allErrors, "cannot") ||
 		!hasError(allErrors, "rune literal not terminated") ||
 		!hasError(allErrors, "could not import c") {
 		t.Errorf("allErrors = %v, want syntax, type and loader errors", allErrors)