diff --git a/prometheus/process_collector_test.go b/prometheus/process_collector_test.go
index 829715a..f00e91e 100644
--- a/prometheus/process_collector_test.go
+++ b/prometheus/process_collector_test.go
@@ -35,13 +35,13 @@ func TestProcessCollector(t *testing.T) {
 
 	for _, re := range []*regexp.Regexp{
 		regexp.MustCompile("process_cpu_seconds_total [0-9]"),
-		regexp.MustCompile("process_max_fds [0-9]{2,}"),
+		regexp.MustCompile("process_max_fds [1-9]"),
 		regexp.MustCompile("process_open_fds [1-9]"),
 		regexp.MustCompile("process_virtual_memory_bytes [1-9]"),
 		regexp.MustCompile("process_resident_memory_bytes [1-9]"),
 		regexp.MustCompile("process_start_time_seconds [0-9.]{10,}"),
 		regexp.MustCompile("foobar_process_cpu_seconds_total [0-9]"),
-		regexp.MustCompile("foobar_process_max_fds [0-9]{2,}"),
+		regexp.MustCompile("foobar_process_max_fds [1-9]"),
 		regexp.MustCompile("foobar_process_open_fds [1-9]"),
 		regexp.MustCompile("foobar_process_virtual_memory_bytes [1-9]"),
 		regexp.MustCompile("foobar_process_resident_memory_bytes [1-9]"),