diff --git a/operator/handler/config.go b/operator/handler/config.go
index 8c6f5d0f..2fd67132 100644
--- a/operator/handler/config.go
+++ b/operator/handler/config.go
@@ -114,7 +114,7 @@ func parseAnnotation(annotations map[string]string) []sidecarConfig {
 // convertTailingSidecarConfigs converts configurations defined in TailingSidecarConfigs to sidecarConfig
 func convertTailingSidecarConfigs(tailingSidecarConfigs []tailingsidecarv1.TailingSidecarConfig) ([]sidecarConfig, error) {
 	sidecarNames := make(map[string]struct{}, len(tailingSidecarConfigs))
-	configs := make([]sidecarConfig, len(tailingSidecarConfigs))
+	configs := []sidecarConfig{}
 
 	for _, tailitailinSidecarConfig := range tailingSidecarConfigs {
 		for name, spec := range tailitailinSidecarConfig.Spec.SidecarSpecs {
diff --git a/operator/handler/config_test.go b/operator/handler/config_test.go
new file mode 100644
index 00000000..030f3290
--- /dev/null
+++ b/operator/handler/config_test.go
@@ -0,0 +1,179 @@
+/*
+Copyright 2021.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package handler
+
+import (
+	tailingsidecarv1 "github.com/SumoLogic/tailing-sidecar/operator/api/v1"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/ginkgo/extensions/table"
+	. "github.com/onsi/gomega"
+	corev1 "k8s.io/api/core/v1"
+)
+
+var _ = Describe("config", func() {
+	DescribeTable("convertTailingSidecarConfigs",
+		func(
+			input []tailingsidecarv1.TailingSidecarConfig,
+			expectedOutputLength int,
+		) {
+			converted, err := convertTailingSidecarConfigs(input)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(converted).To(HaveLen(expectedOutputLength))
+		},
+
+		Entry(
+			"When there are no configs",
+			[]tailingsidecarv1.TailingSidecarConfig{},
+			0,
+		),
+		Entry(
+			"When there is one config and one sidecar",
+			[]tailingsidecarv1.TailingSidecarConfig{
+				{
+					Spec: tailingsidecarv1.TailingSidecarConfigSpec{
+						SidecarSpecs: map[string]tailingsidecarv1.SidecarSpec{
+							"config1": {
+								Path: "/var/log/file1.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+						},
+					},
+				},
+			},
+			// actual output length: 2
+			1,
+		),
+		Entry(
+			"When there is one config and two sidecars",
+			[]tailingsidecarv1.TailingSidecarConfig{
+				{
+					Spec: tailingsidecarv1.TailingSidecarConfigSpec{
+						SidecarSpecs: map[string]tailingsidecarv1.SidecarSpec{
+							"config1": {
+								Path: "/var/log/file1.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+							"config2": {
+								Path: "/var/log/file2.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+						},
+					},
+				},
+			},
+			// actual output length: 3
+			2,
+		),
+		Entry(
+			"When there are two configs and two sidecars",
+			[]tailingsidecarv1.TailingSidecarConfig{
+				{
+					Spec: tailingsidecarv1.TailingSidecarConfigSpec{
+						SidecarSpecs: map[string]tailingsidecarv1.SidecarSpec{
+							"config1": {
+								Path: "/var/log/file1.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+						},
+					},
+				},
+				{
+					Spec: tailingsidecarv1.TailingSidecarConfigSpec{
+						SidecarSpecs: map[string]tailingsidecarv1.SidecarSpec{
+							"config2": {
+								Path: "/var/log/file2.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+						},
+					},
+				},
+			},
+			// actual output length: 4
+			2,
+		),
+		Entry(
+			"When there are two configs and five sidecars",
+			[]tailingsidecarv1.TailingSidecarConfig{
+				{
+					Spec: tailingsidecarv1.TailingSidecarConfigSpec{
+						SidecarSpecs: map[string]tailingsidecarv1.SidecarSpec{
+							"config1": {
+								Path: "/var/log/file1.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+							"config2": {
+								Path: "/var/log/file2.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+						},
+					},
+				},
+				{
+					Spec: tailingsidecarv1.TailingSidecarConfigSpec{
+						SidecarSpecs: map[string]tailingsidecarv1.SidecarSpec{
+							"config3": {
+								Path: "/var/log/file3.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+							"config4": {
+								Path: "/var/log/file4.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+							"config5": {
+								Path: "/var/log/file5.log",
+								VolumeMount: corev1.VolumeMount{
+									Name:      "logs-dir",
+									MountPath: "/var/log",
+								},
+							},
+						},
+					},
+				},
+			},
+			// actual output length: 7
+			5,
+		),
+	)
+})