diff --git a/pkg/container/cgroup_id.go b/pkg/container/cgroup_id.go
index b5335bf..1da1dfe 100644
--- a/pkg/container/cgroup_id.go
+++ b/pkg/container/cgroup_id.go
@@ -17,9 +17,13 @@ func GetRunningContainerID() (cid types.ContainerID, err error) {
 		return
 	}
 
-	matches := dockerContainerPattern.FindStringSubmatch(string(file))
-	if len(matches) < 2 {
-		return "", nil
-	}
-	return types.ContainerID(matches[1]), nil
+	return getRunningContainerIDFromString(string(file)), nil
+}
+
+func getRunningContainerIDFromString(s string) types.ContainerID {
+	matches := dockerContainerPattern.FindStringSubmatch(s)
+	if len(matches) < 2 {
+		return ""
+	}
+	return types.ContainerID(matches[1])
 }
diff --git a/pkg/container/cgroup_id_test.go b/pkg/container/cgroup_id_test.go
new file mode 100644
index 0000000..5f694e3
--- /dev/null
+++ b/pkg/container/cgroup_id_test.go
@@ -0,0 +1,40 @@
+package container
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("GetRunningContainerID", func() {
+	When("a matching container ID is found", func() {
+		It("should return that container ID", func() {
+			cid := getRunningContainerIDFromString(`
+15:name=systemd:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+14:misc:/
+13:rdma:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+12:pids:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+11:hugetlb:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+10:net_prio:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+9:perf_event:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+8:net_cls:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+7:freezer:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+6:devices:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+5:blkio:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+4:cpuacct:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+3:cpu:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+2:cpuset:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+1:memory:/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+0::/docker/991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377
+			`)
+			Expect(cid).To(BeEquivalentTo(`991b6b42691449d3ce90192ff9f006863dcdafc6195e227aeefa298235004377`))
+		})
+	})
+	When("no matching container ID could be found", func() {
+		It("should return that container ID", func() {
+			cid := getRunningContainerIDFromString(`14:misc:/`)
+			Expect(cid).To(BeEmpty())
+		})
+	})
+})
+
+//