src/pkg/testing/benchmark.go | 2 +-
 src/pkg/testing/testing.go   | 2 +-

diff --git a/src/pkg/testing/benchmark.go b/src/pkg/testing/benchmark.go
index d82007e2ced9237e8f25a86a441dbad953603660..ad938027d3eb41c88908fc882decd8e665bff359 100644
--- a/src/pkg/testing/benchmark.go
+++ b/src/pkg/testing/benchmark.go
@@ -175,7 +175,7 @@ 	}
 	for _, Benchmark := range benchmarks {
 		matched, err := matchString(*matchBenchmarks, Benchmark.Name)
 		if err != nil {
-			println("invalid regexp for -benchmarks:", err)
+			println("invalid regexp for -benchmarks:", err.String())
 			os.Exit(1)
 		}
 		if !matched {
diff --git a/src/pkg/testing/testing.go b/src/pkg/testing/testing.go
index ae6d03464611ee583ef2de5eba5c631bcdc483fe..0e04935ce449ddc70c5bce2f151a04501436e3a0 100644
--- a/src/pkg/testing/testing.go
+++ b/src/pkg/testing/testing.go
@@ -144,7 +144,7 @@ 	}
 	for i := 0; i < len(tests); i++ {
 		matched, err := matchString(*match, tests[i].Name)
 		if err != nil {
-			println("invalid regexp for -match:", err)
+			println("invalid regexp for -match:", err.String())
 			os.Exit(1)
 		}
 		if !matched {