Disable flaky TestOpenMetricsNegative

Issue open-telemetry#9119

receiver/prometheusreceiver/metrics_receiver_open_metrics_test.go

@@ -28,6 +28,7 @@ import (
 
 const testDir = "./testdata/openmetrics/"
 
+// nolint:unused
 var skippedTests = map[string]struct{}{
 	"bad_clashing_names_0": {}, "bad_clashing_names_1": {}, "bad_clashing_names_2": {},
 	"bad_counter_values_0": {}, "bad_counter_values_1": {}, "bad_counter_values_2": {},
@@ -77,6 +78,7 @@ func TestOpenMetricsPositive(t *testing.T) {
 	testComponent(t, targets, false, "")
 }
 
+// nolint:unused
 func verifyNegativeTarget(t *testing.T, td *testData, mds []*pdata.ResourceMetrics) {
 	// failing negative tests are skipped since prometheus scrape package is currently not fully
 	// compatible with OpenMetrics tests and successfully scrapes some invalid metrics
@@ -92,6 +94,8 @@ func verifyNegativeTarget(t *testing.T, td *testData, mds []*pdata.ResourceMetri
 
 // Test open metrics negative test cases
 func TestOpenMetricsNegative(t *testing.T) {
+	t.Skip("Flaky test, see https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/9119")
+
 	targetsMap := getOpenMetricsTestData(true)
 	targets := make([]*testData, 0)
 	for k, v := range targetsMap {