diff --git a/src/parse/asp/builtins.go b/src/parse/asp/builtins.go
index 69c2564c17..c34479f304 100644
--- a/src/parse/asp/builtins.go
+++ b/src/parse/asp/builtins.go
@@ -172,10 +172,10 @@ func setLogCode(s *scope, name string, f func(format string, args ...interface{}
 			for i, arg := range args {
 				l[i] = arg
 			}
-			f("//%s: %s", s.pkgFilename(), fmt.Sprintf(string(str), l[1:]...))
+			f("%s: %s", s.pkgFilename(), fmt.Sprintf(string(str), l[1:]...))
 			return None
 		}
-		f("//%s: %s", s.pkgFilename(), args)
+		f("%s: %s", s.pkgFilename(), args)
 		return None
 	}).varargs = true
 }
diff --git a/src/parse/asp/interpreter_test.go b/src/parse/asp/interpreter_test.go
index d94fce0f6c..177d500e61 100644
--- a/src/parse/asp/interpreter_test.go
+++ b/src/parse/asp/interpreter_test.go
@@ -689,7 +689,7 @@ func TestLogConfigVariable(t *testing.T) {
 	setLogCode(s, "info", capture)
 	s.interpretStatements(statements)
 
-	assert.Equal(t, `//: {"baz": 6, "foo": bar}`, capturedOutput)
+	assert.Equal(t, `: {"baz": 6, "foo": bar}`, capturedOutput)
 }
 
 func TestOperatorPrecedence(t *testing.T) {
diff --git a/src/parse/asp/logging_test.go b/src/parse/asp/logging_test.go
index 2c0ac604de..fb8ac0bf15 100644
--- a/src/parse/asp/logging_test.go
+++ b/src/parse/asp/logging_test.go
@@ -52,9 +52,9 @@ func TestLogNotice(t *testing.T) {
 	_, err := parseFile2("src/parse/asp/test_data/interpreter/log.build")
 	require.NoError(t, err)
 	assertRecords(t, backend, []record{
-		{logging.NOTICE, "//test/package/BUILD: notice"},
-		{logging.WARNING, "//test/package/BUILD: warning"},
-		{logging.ERROR, "//test/package/BUILD: error"},
+		{logging.NOTICE, "test/package/BUILD: notice"},
+		{logging.WARNING, "test/package/BUILD: warning"},
+		{logging.ERROR, "test/package/BUILD: error"},
 	})
 }
 
@@ -64,9 +64,9 @@ func TestLogInfo(t *testing.T) {
 	_, err := parseFile2("src/parse/asp/test_data/interpreter/log.build")
 	require.NoError(t, err)
 	assertRecords(t, backend, []record{
-		{logging.INFO, "//test/package/BUILD: info"},
-		{logging.NOTICE, "//test/package/BUILD: notice"},
-		{logging.WARNING, "//test/package/BUILD: warning"},
-		{logging.ERROR, "//test/package/BUILD: error"},
+		{logging.INFO, "test/package/BUILD: info"},
+		{logging.NOTICE, "test/package/BUILD: notice"},
+		{logging.WARNING, "test/package/BUILD: warning"},
+		{logging.ERROR, "test/package/BUILD: error"},
 	})
 }