diff --git a/base/test/metrics/histogram_tester.cc b/base/test/metrics/histogram_tester.cc
index 5977a95c4e595f..96a53d224fd6c0 100644
--- a/base/test/metrics/histogram_tester.cc
+++ b/base/test/metrics/histogram_tester.cc
@@ -41,7 +41,7 @@ void HistogramTester::ExpectUniqueSample(
   } else {
     // No histogram means there were zero samples.
     EXPECT_EQ(0, expected_count)
-        << "Histogram \"" << name << "\" does not exist.";
+        << "Zero samples found for Histogram \"" << name << "\".";
   }
 }