diff --git a/src/runtime/crash_unix_test.go b/src/runtime/crash_unix_test.go
index 1384e002108..987c7095a03 100644
--- a/src/runtime/crash_unix_test.go
+++ b/src/runtime/crash_unix_test.go
@@ -63,7 +63,7 @@ func TestCrashDumpsAllThreads(t *testing.T) {
 		t.Fatalf("failed to create Go file: %v", err)
 	}
 
-	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe", "main.go")
 	cmd.Dir = dir
 	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
 	if err != nil {
diff --git a/src/runtime/runtime-gdb_test.go b/src/runtime/runtime-gdb_test.go
index a988d1d702d..d0f905e4d70 100644
--- a/src/runtime/runtime-gdb_test.go
+++ b/src/runtime/runtime-gdb_test.go
@@ -156,7 +156,7 @@ func testGdbPython(t *testing.T, cgo bool) {
 	}
 	nLines := lastLine(src)
 
-	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe", "main.go")
 	cmd.Dir = dir
 	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
 	if err != nil {
@@ -337,7 +337,7 @@ func TestGdbBacktrace(t *testing.T) {
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
-	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe", "main.go")
 	cmd.Dir = dir
 	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
 	if err != nil {
@@ -408,7 +408,7 @@ func TestGdbAutotmpTypes(t *testing.T) {
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
-	cmd := exec.Command(testenv.GoToolPath(t), "build", "-gcflags=all=-N -l", "-o", "a.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-gcflags=all=-N -l", "-o", "a.exe", "main.go")
 	cmd.Dir = dir
 	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
 	if err != nil {
@@ -474,7 +474,7 @@ func TestGdbConst(t *testing.T) {
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
-	cmd := exec.Command(testenv.GoToolPath(t), "build", "-gcflags=all=-N -l", "-o", "a.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-gcflags=all=-N -l", "-o", "a.exe", "main.go")
 	cmd.Dir = dir
 	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
 	if err != nil {
@@ -539,7 +539,7 @@ func TestGdbPanic(t *testing.T) {
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
-	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe")
+	cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe", "main.go")
 	cmd.Dir = dir
 	out, err := testenv.CleanCmdEnv(cmd).CombinedOutput()
 	if err != nil {