diff --git a/go/analysis/internal/checker/checker.go b/go/analysis/internal/checker/checker.go
index 090e96c..51cbf68 100644
--- a/go/analysis/internal/checker/checker.go
+++ b/go/analysis/internal/checker/checker.go
@@ -51,6 +51,9 @@
 	// Log files for optional performance tracing.
 	CPUProfile, MemProfile, Trace string
 
+	// IncludeTests indicates whether test files should be analyzed too.
+	IncludeTests = true
+
 	// Fix determines whether to apply all suggested fixes.
 	Fix bool
 )
@@ -65,6 +68,7 @@
 	flag.StringVar(&CPUProfile, "cpuprofile", "", "write CPU profile to this file")
 	flag.StringVar(&MemProfile, "memprofile", "", "write memory profile to this file")
 	flag.StringVar(&Trace, "trace", "", "write trace log to this file")
+	flag.BoolVar(&IncludeTests, "test", IncludeTests, "indicates whether test files should be analyzed, too")
 
 	flag.BoolVar(&Fix, "fix", false, "apply all suggested fixes")
 }
@@ -163,7 +167,7 @@
 	}
 	conf := packages.Config{
 		Mode:  mode,
-		Tests: true,
+		Tests: IncludeTests,
 	}
 	initial, err := packages.Load(&conf, patterns...)
 	if err == nil {