diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c3b716e68f..95f62c90363 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@
 - Add Solace PubSub+ Event Broker Scaler ([#1945](https://github.com/kedacore/keda/pull/1945))
 - Add fallback functionality ([#1872](https://github.com/kedacore/keda/issues/1872))
 - Introduce Idle Replica Mode ([#1958](https://github.com/kedacore/keda/pull/1958))
+- Add new scaler for Selenium Grid ([#1971](https://github.com/kedacore/keda/pull/1971))
 - Support using regex to select the queues in RabbitMQ Scaler ([#1957](https://github.com/kedacore/keda/pull/1957))
 
 ### Improvements
diff --git a/pkg/scalers/selenium_grid_scaler.go b/pkg/scalers/selenium_grid_scaler.go
new file mode 100644
index 00000000000..dd8a92f9e7f
--- /dev/null
+++ b/pkg/scalers/selenium_grid_scaler.go
@@ -0,0 +1,230 @@
+package scalers
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	v2beta2 "k8s.io/api/autoscaling/v2beta2"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/metrics/pkg/apis/external_metrics"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
+
+	kedautil "github.com/kedacore/keda/v2/pkg/util"
+)
+
+type seleniumGridScaler struct {
+	metadata *seleniumGridScalerMetadata
+	client   *http.Client
+}
+
+type seleniumGridScalerMetadata struct {
+	url            string
+	browserName    string
+	targetValue    int64
+	browserVersion string
+}
+
+type seleniumResponse struct {
+	Data data `json:"data"`
+}
+
+type data struct {
+	SessionsInfo sessionsInfo `json:"sessionsInfo"`
+}
+
+type sessionsInfo struct {
+	SessionQueueRequests []string          `json:"sessionQueueRequests"`
+	Sessions             []seleniumSession `json:"sessions"`
+}
+
+type seleniumSession struct {
+	ID           string `json:"id"`
+	Capabilities string `json:"capabilities"`
+	NodeID       string `json:"nodeId"`
+}
+
+type capability struct {
+	BrowserName    string `json:"browserName"`
+	BrowserVersion string `json:"browserVersion"`
+}
+
+const (
+	DefaultBrowserVersion string = "latest"
+)
+
+var seleniumGridLog = logf.Log.WithName("selenium_grid_scaler")
+
+func NewSeleniumGridScaler(config *ScalerConfig) (Scaler, error) {
+	meta, err := parseSeleniumGridScalerMetadata(config)
+
+	if err != nil {
+		return nil, fmt.Errorf("error parsing selenium grid metadata: %s", err)
+	}
+
+	httpClient := kedautil.CreateHTTPClient(config.GlobalHTTPTimeout)
+
+	return &seleniumGridScaler{
+		metadata: meta,
+		client:   httpClient,
+	}, nil
+}
+
+func parseSeleniumGridScalerMetadata(config *ScalerConfig) (*seleniumGridScalerMetadata, error) {
+	meta := seleniumGridScalerMetadata{
+		targetValue: 1,
+	}
+
+	if val, ok := config.TriggerMetadata["url"]; ok {
+		meta.url = val
+	} else {
+		return nil, fmt.Errorf("no selenium grid url given in metadata")
+	}
+
+	if val, ok := config.TriggerMetadata["browserName"]; ok {
+		meta.browserName = val
+	} else {
+		return nil, fmt.Errorf("no browser name given in metadata")
+	}
+
+	if val, ok := config.TriggerMetadata["browserVersion"]; ok && val != "" {
+		meta.browserVersion = val
+	} else {
+		meta.browserVersion = DefaultBrowserVersion
+	}
+
+	return &meta, nil
+}
+
+// No cleanup required for selenium grid scaler
+func (s *seleniumGridScaler) Close() error {
+	return nil
+}
+
+func (s *seleniumGridScaler) GetMetrics(ctx context.Context, metricName string, metricSelector labels.Selector) ([]external_metrics.ExternalMetricValue, error) {
+	v, err := s.getSessionsCount()
+	if err != nil {
+		return []external_metrics.ExternalMetricValue{}, fmt.Errorf("error requesting selenium grid endpoint: %s", err)
+	}
+
+	metric := external_metrics.ExternalMetricValue{
+		MetricName: metricName,
+		Value:      *v,
+		Timestamp:  metav1.Now(),
+	}
+
+	return append([]external_metrics.ExternalMetricValue{}, metric), nil
+}
+
+func (s *seleniumGridScaler) GetMetricSpecForScaling() []v2beta2.MetricSpec {
+	targetValue := resource.NewQuantity(s.metadata.targetValue, resource.DecimalSI)
+	metricName := kedautil.NormalizeString(fmt.Sprintf("%s-%s-%s-%s", "seleniumgrid", s.metadata.url, s.metadata.browserName, s.metadata.browserVersion))
+	externalMetric := &v2beta2.ExternalMetricSource{
+		Metric: v2beta2.MetricIdentifier{
+			Name: metricName,
+		},
+		Target: v2beta2.MetricTarget{
+			Type:         v2beta2.AverageValueMetricType,
+			AverageValue: targetValue,
+		},
+	}
+	metricSpec := v2beta2.MetricSpec{
+		External: externalMetric, Type: externalMetricType,
+	}
+	return []v2beta2.MetricSpec{metricSpec}
+}
+
+func (s *seleniumGridScaler) IsActive(ctx context.Context) (bool, error) {
+	v, err := s.getSessionsCount()
+	if err != nil {
+		return false, err
+	}
+
+	return v.AsApproximateFloat64() > 0.0, nil
+}
+
+func (s *seleniumGridScaler) getSessionsCount() (*resource.Quantity, error) {
+	body, err := json.Marshal(map[string]string{
+		"query": "{ sessionsInfo { sessionQueueRequests, sessions { id, capabilities, nodeId } } }",
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequest("POST", s.metadata.url, bytes.NewBuffer(body))
+	if err != nil {
+		return nil, err
+	}
+
+	res, err := s.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	if res.StatusCode != http.StatusOK {
+		msg := fmt.Sprintf("selenium grid returned %d", res.StatusCode)
+		return nil, errors.New(msg)
+	}
+
+	defer res.Body.Close()
+	b, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return nil, err
+	}
+	v, err := getCountFromSeleniumResponse(b, s.metadata.browserName, s.metadata.browserVersion)
+	if err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+func getCountFromSeleniumResponse(b []byte, browserName string, browserVersion string) (*resource.Quantity, error) {
+	var count int64
+	var seleniumResponse = seleniumResponse{}
+
+	if err := json.Unmarshal(b, &seleniumResponse); err != nil {
+		return nil, err
+	}
+
+	var sessionQueueRequests = seleniumResponse.Data.SessionsInfo.SessionQueueRequests
+	for _, sessionQueueRequest := range sessionQueueRequests {
+		var capability = capability{}
+		if err := json.Unmarshal([]byte(sessionQueueRequest), &capability); err == nil {
+			if capability.BrowserName == browserName {
+				if strings.HasPrefix(capability.BrowserVersion, browserVersion) {
+					count++
+				} else if capability.BrowserVersion == "" && browserVersion == DefaultBrowserVersion {
+					count++
+				}
+			}
+		} else {
+			seleniumGridLog.Error(err, fmt.Sprintf("Error when unmarshaling session queue requests: %s", err))
+		}
+	}
+
+	var sessions = seleniumResponse.Data.SessionsInfo.Sessions
+	for _, session := range sessions {
+		var capability = capability{}
+		if err := json.Unmarshal([]byte(session.Capabilities), &capability); err == nil {
+			if capability.BrowserName == browserName {
+				if strings.HasPrefix(capability.BrowserVersion, browserVersion) {
+					count++
+				} else if browserVersion == DefaultBrowserVersion {
+					count++
+				}
+			}
+		} else {
+			seleniumGridLog.Error(err, fmt.Sprintf("Error when unmarshaling sessions info: %s", err))
+		}
+	}
+
+	return resource.NewQuantity(count, resource.DecimalSI), nil
+}
diff --git a/pkg/scalers/selenium_grid_scaler_test.go b/pkg/scalers/selenium_grid_scaler_test.go
new file mode 100644
index 00000000000..a6ae05b5f8c
--- /dev/null
+++ b/pkg/scalers/selenium_grid_scaler_test.go
@@ -0,0 +1,237 @@
+package scalers
+
+import (
+	"reflect"
+	"testing"
+
+	"k8s.io/apimachinery/pkg/api/resource"
+)
+
+func Test_getCountFromSeleniumResponse(t *testing.T) {
+	type args struct {
+		b              []byte
+		browserName    string
+		browserVersion string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    *resource.Quantity
+		wantErr bool
+	}{
+		{
+			name: "nil response body should through error",
+			args: args{
+				b:           []byte(nil),
+				browserName: "",
+			},
+			// want:    resource.NewQuantity(0, resource.DecimalSI),
+			wantErr: true,
+		},
+		{
+			name: "empty response body should through error",
+			args: args{
+				b:           []byte(""),
+				browserName: "",
+			},
+			// want:    resource.NewQuantity(0, resource.DecimalSI),
+			wantErr: true,
+		},
+		{
+			name: "no active sessions should return count as 0",
+			args: args{
+				b: []byte(`{
+					"data": {
+						"sessionsInfo": {
+							"sessionQueueRequests": [],
+							"sessions": []
+						}
+					}
+				}`),
+				browserName: "",
+			},
+			want:    resource.NewQuantity(0, resource.DecimalSI),
+			wantErr: false,
+		},
+		{
+			name: "active sessions with no matching browsername should return count as 0",
+			args: args{
+				b: []byte(`{
+					"data": {
+						"sessionsInfo": {
+							"sessionQueueRequests": ["{\n  \"browserName\": \"chrome\"\n}","{\n  \"browserName\": \"chrome\"\n}"],
+							"sessions": [
+								{
+									"id": "0f9c5a941aa4d755a54b84be1f6535b1",
+									"capabilities": "{\n  \"acceptInsecureCerts\": false,\n  \"browserName\": \"chrome\",\n  \"browserVersion\": \"91.0.4472.114\",\n  \"chrome\": {\n    \"chromedriverVersion\": \"91.0.4472.101 (af52a90bf87030dd1523486a1cd3ae25c5d76c9b-refs\\u002fbranch-heads\\u002f4472@{#1462})\",\n    \"userDataDir\": \"\\u002ftmp\\u002f.com.google.Chrome.DMqx9m\"\n  },\n  \"goog:chromeOptions\": {\n    \"debuggerAddress\": \"localhost:35839\"\n  },\n  \"networkConnectionEnabled\": false,\n  \"pageLoadStrategy\": \"normal\",\n  \"platformName\": \"linux\",\n  \"proxy\": {\n  },\n  \"se:cdp\": \"http:\\u002f\\u002flocalhost:35839\",\n  \"se:cdpVersion\": \"91.0.4472.114\",\n  \"se:vncEnabled\": true,\n  \"se:vncLocalAddress\": \"ws:\\u002f\\u002flocalhost:7900\\u002fwebsockify\",\n  \"setWindowRect\": true,\n  \"strictFileInteractability\": false,\n  \"timeouts\": {\n    \"implicit\": 0,\n    \"pageLoad\": 300000,\n    \"script\": 30000\n  },\n  \"unhandledPromptBehavior\": \"dismiss and notify\",\n  \"webauthn:extension:largeBlob\": true,\n  \"webauthn:virtualAuthenticators\": true\n}",
+									"nodeId": "d44dcbc5-0b2c-4d5e-abf4-6f6aa5e0983c"
+								}
+							]
+						}
+					}
+				}`),
+				browserName:    "",
+				browserVersion: "latest",
+			},
+			want:    resource.NewQuantity(0, resource.DecimalSI),
+			wantErr: false,
+		},
+		{
+			name: "active sessions with matching browsername should return count as 2",
+			args: args{
+				b: []byte(`{
+					"data": {
+						"sessionsInfo": {
+							"sessionQueueRequests": ["{\n  \"browserName\": \"chrome\"\n}","{\n  \"browserName\": \"chrome\"\n}"],
+							"sessions": []
+						}
+					}
+				}`),
+				browserName:    "chrome",
+				browserVersion: "latest",
+			},
+			want:    resource.NewQuantity(2, resource.DecimalSI),
+			wantErr: false,
+		},
+		{
+			name: "active sessions with matching browsername should return count as 3",
+			args: args{
+				b: []byte(`{
+					"data": {
+						"sessionsInfo": {
+							"sessionQueueRequests": ["{\n  \"browserName\": \"chrome\"\n}","{\n  \"browserName\": \"chrome\"\n}"],
+							"sessions": [
+								{
+									"id": "0f9c5a941aa4d755a54b84be1f6535b1",
+									"capabilities": "{\n  \"acceptInsecureCerts\": false,\n  \"browserName\": \"chrome\",\n  \"browserVersion\": \"91.0.4472.114\",\n  \"chrome\": {\n    \"chromedriverVersion\": \"91.0.4472.101 (af52a90bf87030dd1523486a1cd3ae25c5d76c9b-refs\\u002fbranch-heads\\u002f4472@{#1462})\",\n    \"userDataDir\": \"\\u002ftmp\\u002f.com.google.Chrome.DMqx9m\"\n  },\n  \"goog:chromeOptions\": {\n    \"debuggerAddress\": \"localhost:35839\"\n  },\n  \"networkConnectionEnabled\": false,\n  \"pageLoadStrategy\": \"normal\",\n  \"platformName\": \"linux\",\n  \"proxy\": {\n  },\n  \"se:cdp\": \"http:\\u002f\\u002flocalhost:35839\",\n  \"se:cdpVersion\": \"91.0.4472.114\",\n  \"se:vncEnabled\": true,\n  \"se:vncLocalAddress\": \"ws:\\u002f\\u002flocalhost:7900\\u002fwebsockify\",\n  \"setWindowRect\": true,\n  \"strictFileInteractability\": false,\n  \"timeouts\": {\n    \"implicit\": 0,\n    \"pageLoad\": 300000,\n    \"script\": 30000\n  },\n  \"unhandledPromptBehavior\": \"dismiss and notify\",\n  \"webauthn:extension:largeBlob\": true,\n  \"webauthn:virtualAuthenticators\": true\n}",
+									"nodeId": "d44dcbc5-0b2c-4d5e-abf4-6f6aa5e0983c"
+								}
+							]
+						}
+					}
+				}`),
+				browserName:    "chrome",
+				browserVersion: "latest",
+			},
+			want:    resource.NewQuantity(3, resource.DecimalSI),
+			wantErr: false,
+		},
+		{
+			name: "active sessions with matching browsername and version should return count as 2",
+			args: args{
+				b: []byte(`{
+					"data": {
+						"sessionsInfo": {
+							"sessionQueueRequests": ["{\n  \"browserName\": \"chrome\",\n \"browserVersion\": \"91.0\"\n}","{\n  \"browserName\": \"chrome\"\n}"],
+							"sessions": [
+								{
+									"id": "0f9c5a941aa4d755a54b84be1f6535b1",
+									"capabilities": "{\n  \"acceptInsecureCerts\": false,\n  \"browserName\": \"chrome\",\n  \"browserVersion\": \"91.0.4472.114\",\n  \"chrome\": {\n    \"chromedriverVersion\": \"91.0.4472.101 (af52a90bf87030dd1523486a1cd3ae25c5d76c9b-refs\\u002fbranch-heads\\u002f4472@{#1462})\",\n    \"userDataDir\": \"\\u002ftmp\\u002f.com.google.Chrome.DMqx9m\"\n  },\n  \"goog:chromeOptions\": {\n    \"debuggerAddress\": \"localhost:35839\"\n  },\n  \"networkConnectionEnabled\": false,\n  \"pageLoadStrategy\": \"normal\",\n  \"platformName\": \"linux\",\n  \"proxy\": {\n  },\n  \"se:cdp\": \"http:\\u002f\\u002flocalhost:35839\",\n  \"se:cdpVersion\": \"91.0.4472.114\",\n  \"se:vncEnabled\": true,\n  \"se:vncLocalAddress\": \"ws:\\u002f\\u002flocalhost:7900\\u002fwebsockify\",\n  \"setWindowRect\": true,\n  \"strictFileInteractability\": false,\n  \"timeouts\": {\n    \"implicit\": 0,\n    \"pageLoad\": 300000,\n    \"script\": 30000\n  },\n  \"unhandledPromptBehavior\": \"dismiss and notify\",\n  \"webauthn:extension:largeBlob\": true,\n  \"webauthn:virtualAuthenticators\": true\n}",
+									"nodeId": "d44dcbc5-0b2c-4d5e-abf4-6f6aa5e0983c"
+								}
+							]
+						}
+					}
+				}`),
+				browserName:    "chrome",
+				browserVersion: "91.0",
+			},
+			want:    resource.NewQuantity(2, resource.DecimalSI),
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := getCountFromSeleniumResponse(tt.args.b, tt.args.browserName, tt.args.browserVersion)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("getCountFromSeleniumResponse() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("getCountFromSeleniumResponse() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_parseSeleniumGridScalerMetadata(t *testing.T) {
+	type args struct {
+		config *ScalerConfig
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    *seleniumGridScalerMetadata
+		wantErr bool
+	}{
+		{
+			name: "invalid url string should throw error",
+			args: args{
+				config: &ScalerConfig{
+					TriggerMetadata: map[string]string{},
+				},
+			},
+			wantErr: true,
+		},
+		{
+			name: "invalid browsername string should throw error",
+			args: args{
+				config: &ScalerConfig{
+					TriggerMetadata: map[string]string{
+						"url": "",
+					},
+				},
+			},
+			wantErr: true,
+		},
+		{
+			name: "valid url and browsername should return metadata",
+			args: args{
+				config: &ScalerConfig{
+					TriggerMetadata: map[string]string{
+						"url":         "http://selenium-hub:4444/graphql",
+						"browserName": "chrome",
+					},
+				},
+			},
+			wantErr: false,
+			want: &seleniumGridScalerMetadata{
+				url:            "http://selenium-hub:4444/graphql",
+				browserName:    "chrome",
+				targetValue:    1,
+				browserVersion: "latest",
+			},
+		},
+		{
+			name: "valid url and browsername should return metadata",
+			args: args{
+				config: &ScalerConfig{
+					TriggerMetadata: map[string]string{
+						"url":            "http://selenium-hub:4444/graphql",
+						"browserName":    "chrome",
+						"browserVersion": "91.0",
+					},
+				},
+			},
+			wantErr: false,
+			want: &seleniumGridScalerMetadata{
+				url:            "http://selenium-hub:4444/graphql",
+				browserName:    "chrome",
+				targetValue:    1,
+				browserVersion: "91.0",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := parseSeleniumGridScalerMetadata(tt.args.config)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("parseSeleniumGridScalerMetadata() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("parseSeleniumGridScalerMetadata() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
diff --git a/pkg/scaling/scale_handler.go b/pkg/scaling/scale_handler.go
index 90dd6e66990..40a3a1564e8 100644
--- a/pkg/scaling/scale_handler.go
+++ b/pkg/scaling/scale_handler.go
@@ -449,6 +449,8 @@ func buildScaler(triggerType string, config *scalers.ScalerConfig) (scalers.Scal
 		return scalers.NewRedisStreamsScaler(true, config)
 	case "redis-streams":
 		return scalers.NewRedisStreamsScaler(false, config)
+	case "selenium-grid":
+		return scalers.NewSeleniumGridScaler(config)
 	case "solace-event-queue":
 		return scalers.NewSolaceScaler(config)
 	case "stan":
diff --git a/tests/scalers/selenium-grid-test.ts b/tests/scalers/selenium-grid-test.ts
new file mode 100644
index 00000000000..03cfbcf1fc4
--- /dev/null
+++ b/tests/scalers/selenium-grid-test.ts
@@ -0,0 +1,626 @@
+import test from 'ava'
+import * as sh from 'shelljs'
+import * as tmp from 'tmp'
+import * as fs from 'fs'
+
+const seleniumGridNamespace = 'selenium-grid';
+const seleniumGridHostName = `selenium-hub.${seleniumGridNamespace}`;
+const seleniumGridPort = "4444";
+const seleniumGridGraphQLUrl = `http://${seleniumGridHostName}:${seleniumGridPort}/graphql`;
+const seleniumGridTestName = 'selenium-random-tests';
+
+test.before(t => {
+  sh.exec(`kubectl create namespace ${seleniumGridNamespace}`);
+
+  const seleniumGridDeployTmpFile = tmp.fileSync();
+  fs.writeFileSync(seleniumGridDeployTmpFile.name, seleniumGridYaml.replace(/{{NAMESPACE}}/g, seleniumGridNamespace));
+
+  t.is(0, sh.exec(`kubectl apply --namespace ${seleniumGridNamespace} -f ${seleniumGridDeployTmpFile.name}`).code, 'creating a Selenium Grid deployment should work.')
+
+  let seleniumHubReplicaCount = '0';
+
+  for (let i = 0; i < 30; i++) {
+    seleniumHubReplicaCount = sh.exec(`kubectl get deploy/selenium-hub -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout
+    if (seleniumHubReplicaCount == '1') {
+      break;
+    }
+    console.log('Waiting for selenium hub to be ready');
+    sh.exec('sleep 2s')
+  }
+  t.is('1', seleniumHubReplicaCount, 'Selenium Hub is not in a ready state')
+});
+
+test.serial('should have one node for chrome and firefox each at start', t => {
+  let seleniumChromeNodeReplicaCount = '0';
+  let seleniumFireFoxReplicaCount = '0';
+  for (let i = 0; i < 30; i++) {
+    seleniumChromeNodeReplicaCount = sh.exec(`kubectl get deploy/selenium-chrome-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout
+    seleniumFireFoxReplicaCount = sh.exec(`kubectl get deploy/selenium-firefox-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout
+    if (seleniumChromeNodeReplicaCount == '1' && seleniumFireFoxReplicaCount == '1') {
+      break;
+    }
+    console.log('Waiting for chrome and firefox node to be ready');
+    sh.exec('sleep 2s')
+  }
+
+  t.is('1', seleniumChromeNodeReplicaCount, 'Selenium Chrome Node did not scale up to 1 pods')
+  t.is('1', seleniumFireFoxReplicaCount, 'Selenium Firefox Node did not scale up to 1 pods')
+});
+
+test.serial('should scale down browser nodes to 0', t => {
+  const scaledObjectDeployTmpFile = tmp.fileSync();
+  fs.writeFileSync(scaledObjectDeployTmpFile.name, scaledObjectYaml.replace(/{{NAMESPACE}}/g, seleniumGridNamespace).replace(/{{SELENIUM_GRID_GRAPHQL_URL}}/g, seleniumGridGraphQLUrl));
+
+  t.is(0, sh.exec(`kubectl apply --namespace ${seleniumGridNamespace} -f ${scaledObjectDeployTmpFile.name}`).code, 'creating a Scaled Object CRD should work.')
+
+  let seleniumChromeNodeReplicaCount = '1';
+  let seleniumFireFoxReplicaCount = '1';
+  for (let i = 0; i < 60; i++) {
+    seleniumChromeNodeReplicaCount = sh.exec(`kubectl get deploy/selenium-chrome-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout
+    seleniumFireFoxReplicaCount = sh.exec(`kubectl get deploy/selenium-firefox-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout
+    if (seleniumChromeNodeReplicaCount == '0' && seleniumFireFoxReplicaCount == '0') {
+      break;
+    }
+    console.log('Waiting for chrome and firefox to scale down to 0 pods')
+    sh.exec('sleep 5s')
+  }
+
+  t.is('0', seleniumChromeNodeReplicaCount, 'Selenium Chrome Node did not scale down to 0 pods')
+  t.is('0', seleniumFireFoxReplicaCount, 'Selenium Firefox Node did not scale down to 0 pods')
+});
+
+test.serial('should create one chrome and firefox node', t => {
+  const seleniumGridTestDeployTmpFile = tmp.fileSync();
+  fs.writeFileSync(
+    seleniumGridTestDeployTmpFile.name,
+    seleniumGridTestsYaml
+      .replace(/{{JOB_NAME}}/g, seleniumGridTestName)
+      .replace(/{{CONTAINER_NAME}}/g, seleniumGridTestName)
+      .replace(/{{HOST_NAME}}/g, seleniumGridHostName)
+      .replace(/{{PORT}}/g, seleniumGridPort)
+      .replace(/{{WITH_VERSION}}/g, "false")
+  );
+
+  t.is(0, sh.exec(`kubectl apply --namespace ${seleniumGridNamespace} -f ${seleniumGridTestDeployTmpFile.name}`).code, 'creating a Selenium Grid Tests deployment should work.');
+
+  // wait for selenium grid tests to start running
+  for (let i = 0; i < 20; i++) {
+    const running = sh.exec(`kubectl get job ${seleniumGridTestName} --namespace ${seleniumGridNamespace} -o jsonpath='{.items[0].status.running}'`).stdout
+    if (running == '1') {
+      break;
+    }
+    sh.exec('sleep 1s')
+  }
+
+  let seleniumChromeNodeReplicaCount = '0';
+  let seleniumFireFoxReplicaCount = '0';
+  for (let i = 0; i < 30; i++) {
+    seleniumChromeNodeReplicaCount = seleniumChromeNodeReplicaCount != '1' ? sh.exec(`kubectl get deploy/selenium-chrome-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout : seleniumChromeNodeReplicaCount;
+    seleniumFireFoxReplicaCount = seleniumFireFoxReplicaCount != '1' ? sh.exec(`kubectl get deploy/selenium-firefox-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout : seleniumFireFoxReplicaCount;
+    if (seleniumChromeNodeReplicaCount == '1' && seleniumFireFoxReplicaCount == '1') {
+      break;
+    }
+    console.log('Waiting for chrome to scale up 1 pod and firefox to 1 pod');
+    sh.exec('sleep 2s')
+  }
+
+  t.is('1', seleniumChromeNodeReplicaCount, 'Selenium Chrome Node did not scale up to 1 pod')
+  t.is('1', seleniumFireFoxReplicaCount, 'Selenium Firefox Node did not scale up to 1 pod')
+
+  // wait for selenium grid tests to complete
+  let succeeded = '0';
+  for (let i = 0; i < 60; i++) {
+    succeeded = sh.exec(`kubectl get job ${seleniumGridTestName} --namespace ${seleniumGridNamespace} -o jsonpath='{.items[0].status.succeeded}'`).stdout
+    if (succeeded == '1') {
+      break;
+    }
+    sh.exec('sleep 1s')
+  }
+
+  sh.exec(`kubectl delete job/${seleniumGridTestName} --namespace ${seleniumGridNamespace}`)
+});
+
+test.serial('should scale down chrome and firefox nodes to 0', t => {
+
+  let seleniumChromeNodeReplicaCount = '1';
+  let seleniumFireFoxReplicaCount = '1';
+  for (let i = 0; i < 65; i++) {
+    seleniumChromeNodeReplicaCount = sh.exec(`kubectl get deploy/selenium-chrome-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout;
+    seleniumFireFoxReplicaCount = sh.exec(`kubectl get deploy/selenium-firefox-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout;
+    if (seleniumChromeNodeReplicaCount == '0' && seleniumFireFoxReplicaCount == '0') {
+      break;
+    }
+    console.log('Waiting for chrome and firefox to scale down to 0 pod');
+    sh.exec('sleep 5s')
+  }
+
+  t.is('0', seleniumChromeNodeReplicaCount, 'Selenium Chrome Node did not scale down to 0 pod')
+  t.is('0', seleniumFireFoxReplicaCount, 'Selenium Firefox Node did not scale down to 0 pod')
+});
+
+test.serial('should create two chrome and one firefox nodes', t => {
+  const chrome91DeployTmpFile = tmp.fileSync();
+  fs.writeFileSync(chrome91DeployTmpFile.name, chrome91Yaml.replace(/{{NAMESPACE}}/g, seleniumGridNamespace).replace(/{{SELENIUM_GRID_GRAPHQL_URL}}/g, seleniumGridGraphQLUrl));
+
+  t.is(0, sh.exec(`kubectl apply --namespace ${seleniumGridNamespace} -f ${chrome91DeployTmpFile.name}`).code, 'creating Chrome 91 node should work.')
+
+  let seleniumChrome91NodeReplicaCount = '1';
+  for (let i = 0; i < 60; i++) {
+    seleniumChrome91NodeReplicaCount = sh.exec(`kubectl get deploy/selenium-chrome-node-91 -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout
+    if (seleniumChrome91NodeReplicaCount == '0') {
+      break;
+    }
+    console.log('Waiting for chrome 91 to scale down to 0 pods')
+    sh.exec('sleep 5s')
+  }
+
+  const seleniumGridTestDeployTmpFile = tmp.fileSync();
+  fs.writeFileSync(
+    seleniumGridTestDeployTmpFile.name,
+    seleniumGridTestsYaml
+      .replace(/{{JOB_NAME}}/g, seleniumGridTestName)
+      .replace(/{{CONTAINER_NAME}}/g, seleniumGridTestName)
+      .replace(/{{HOST_NAME}}/g, seleniumGridHostName)
+      .replace(/{{PORT}}/g, seleniumGridPort)
+      .replace(/{{WITH_VERSION}}/g, "true")
+  );
+
+  t.is(0, sh.exec(`kubectl apply --namespace ${seleniumGridNamespace} -f ${seleniumGridTestDeployTmpFile.name}`).code, 'creating a Selenium Grid Tests deployment should work.');
+
+  // wait for selenium grid tests to start running
+  for (let i = 0; i < 20; i++) {
+    const running = sh.exec(`kubectl get job ${seleniumGridTestName} --namespace ${seleniumGridNamespace} -o jsonpath='{.items[0].status.running}'`).stdout
+    if (running == '1') {
+      break;
+    }
+    sh.exec('sleep 1s')
+  }
+
+  let seleniumChromeNodeReplicaCount = '0';
+  let seleniumFireFoxReplicaCount = '0';
+  seleniumChrome91NodeReplicaCount = '0';
+  for (let i = 0; i < 30; i++) {
+    seleniumChromeNodeReplicaCount = seleniumChromeNodeReplicaCount != '1' ? sh.exec(`kubectl get deploy/selenium-chrome-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout : seleniumChromeNodeReplicaCount;
+    seleniumFireFoxReplicaCount = seleniumFireFoxReplicaCount != '1' ? sh.exec(`kubectl get deploy/selenium-firefox-node -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout : seleniumFireFoxReplicaCount;
+    seleniumChrome91NodeReplicaCount = seleniumChrome91NodeReplicaCount != '1' ? sh.exec(`kubectl get deploy/selenium-chrome-node-91 -n ${seleniumGridNamespace} -o jsonpath='{.spec.replicas}'`).stdout : seleniumChrome91NodeReplicaCount;
+    if (seleniumChromeNodeReplicaCount == '1' && seleniumFireFoxReplicaCount == '1' && seleniumChrome91NodeReplicaCount == '1') {
+      break;
+    }
+    console.log('Waiting for chrome to scale up 2 pods and firefox to 1 pod');
+    sh.exec('sleep 2s')
+  }
+
+  sh.exec(`kubectl delete job/${seleniumGridTestName} --namespace ${seleniumGridNamespace}`)
+
+  t.is('1', seleniumChromeNodeReplicaCount, 'Selenium Chrome Node did not scale up to 1 pod')
+  t.is('1', seleniumChrome91NodeReplicaCount, 'Selenium Chrome 91 Node did not scale up to 1 pod')
+  t.is('1', seleniumFireFoxReplicaCount, 'Selenium Firefox Node did not scale up to 1 pod')
+});
+
+test.after.always.cb('clean up prometheus deployment', t => {
+  let resources = [
+    'scaledobject.keda.sh/selenium-grid-chrome-scaledobject',
+    'scaledobject.keda.sh/selenium-grid-firefox-scaledobject',
+    'service/selenium-chrome-node',
+    'deployment.apps/selenium-chrome-node',
+    'service/selenium-firefox-node',
+    'deployment.apps/selenium-firefox-node',
+    'service/selenium-hub',
+    'deployment.apps/selenium-hub',
+    `job/${seleniumGridTestName}`,
+    'config/selenium-event-bus-config'
+  ]
+
+  for (const resource of resources) {
+    sh.exec(`kubectl delete ${resource} --namespace ${seleniumGridNamespace}`)
+  }
+  sh.exec(`kubectl delete namespace ${seleniumGridNamespace}`)
+
+  t.end()
+});
+
+const seleniumGridYaml = `---
+# Source: selenium-grid/templates/event-bus-configmap.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: selenium-event-bus-config
+  namespace: {{NAMESPACE}}
+  labels:
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+data:
+  SE_EVENT_BUS_HOST: selenium-hub
+  SE_EVENT_BUS_PUBLISH_PORT: "4442"
+  SE_EVENT_BUS_SUBSCRIBE_PORT: "4443"
+---
+# Source: selenium-grid/templates/chrome-node-service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: selenium-chrome-node
+  namespace: {{NAMESPACE}}
+  labels:
+    name: selenium-chrome-node
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  type: ClusterIP
+  selector:
+    app: selenium-chrome-node
+  ports:
+    - name: tcp-chrome
+      protocol: TCP
+      port: 6900
+      targetPort: 5900
+---
+# Source: selenium-grid/templates/firefox-node-service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: selenium-firefox-node
+  namespace: {{NAMESPACE}}
+  labels:
+    name: selenium-firefox-node
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  type: ClusterIP
+  selector:
+    app: selenium-firefox-node
+  ports:
+    - name: tcp-firefox
+      protocol: TCP
+      port: 6900
+      targetPort: 5900
+---
+# Source: selenium-grid/templates/hub-service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: selenium-hub
+  namespace: {{NAMESPACE}}
+  labels:
+    app: selenium-hub
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  selector:
+    app: selenium-hub
+  type: NodePort
+  ports:
+    - name: http-hub
+      protocol: TCP
+      port: 4444
+      targetPort: 4444
+    - name: tcp-hub-pub
+      protocol: TCP
+      port: 4442
+      targetPort: 4442
+    - name: tcp-hub-sub
+      protocol: TCP
+      port: 4443
+      targetPort: 4443
+---
+# Source: selenium-grid/templates/chrome-node-deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: selenium-chrome-node
+  namespace: {{NAMESPACE}}
+  labels: &chrome_node_labels
+    app: selenium-chrome-node
+    app.kubernetes.io/name: selenium-chrome-node
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: selenium-chrome-node
+  template:
+    metadata:
+      labels: *chrome_node_labels
+      annotations:
+        checksum/event-bus-configmap: 0e5e9d25a669359a37dd0d684c485f4c05729da5a26a841ad9a2743d99460f73
+    spec:
+      containers:
+        - name: selenium-chrome-node
+          image: selenium/node-chrome:4.0.0-rc-1-prerelease-20210618
+          imagePullPolicy: IfNotPresent
+          envFrom:
+            - configMapRef:
+                name: selenium-event-bus-config
+          ports:
+            - containerPort: 5553
+              protocol: TCP
+          volumeMounts:
+            - name: dshm
+              mountPath: /dev/shm
+          resources:
+            limits:
+              cpu: "1"
+              memory: 1Gi
+            requests:
+              cpu: "1"
+              memory: 1Gi
+      volumes:
+        - name: dshm
+          emptyDir:
+            medium: Memory
+            sizeLimit: 1Gi
+---
+# Source: selenium-grid/templates/firefox-node-deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: selenium-firefox-node
+  namespace: {{NAMESPACE}}
+  labels: &firefox_node_labels
+    app: selenium-firefox-node
+    app.kubernetes.io/name: selenium-firefox-node
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: selenium-firefox-node
+  template:
+    metadata:
+      labels: *firefox_node_labels
+      annotations:
+        checksum/event-bus-configmap: 0e5e9d25a669359a37dd0d684c485f4c05729da5a26a841ad9a2743d99460f73
+    spec:
+      containers:
+        - name: selenium-firefox-node
+          image: selenium/node-firefox:4.0.0-rc-1-prerelease-20210618
+          imagePullPolicy: IfNotPresent
+          envFrom:
+            - configMapRef:
+                name: selenium-event-bus-config
+          ports:
+            - containerPort: 5553
+              protocol: TCP
+          volumeMounts:
+            - name: dshm
+              mountPath: /dev/shm
+          resources:
+            limits:
+              cpu: "1"
+              memory: 1Gi
+            requests:
+              cpu: "1"
+              memory: 1Gi
+      volumes:
+        - name: dshm
+          emptyDir:
+            medium: Memory
+            sizeLimit: 1Gi
+---
+# Source: selenium-grid/templates/hub-deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: selenium-hub
+  namespace: {{NAMESPACE}}
+  labels: &hub_labels
+    app: selenium-hub
+    app.kubernetes.io/name: selenium-hub
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: selenium-hub
+  template:
+    metadata:
+      labels: *hub_labels
+    spec:
+      containers:
+        - name: selenium-hub
+          image: selenium/hub:4.0.0-rc-1-prerelease-20210618
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 4444
+              protocol: TCP
+            - containerPort: 4442
+              protocol: TCP
+            - containerPort: 4443
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /wd/hub/status
+              port: 4444
+            initialDelaySeconds: 10
+            periodSeconds: 10
+            timeoutSeconds: 10
+            successThreshold: 1
+            failureThreshold: 10
+          readinessProbe:
+            httpGet:
+              path: /wd/hub/status
+              port: 4444
+            initialDelaySeconds: 12
+            periodSeconds: 10
+            timeoutSeconds: 10
+            successThreshold: 1
+            failureThreshold: 10`
+
+const chrome91Yaml = `# Source: selenium-grid/templates/chrome-node-91-deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: selenium-chrome-node-91
+  namespace: {{NAMESPACE}}
+  labels: &chrome_node_labels
+    app: selenium-chrome-node-91
+    app.kubernetes.io/name: selenium-chrome-node-91
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: selenium-chrome-node-91
+  template:
+    metadata:
+      labels: *chrome_node_labels
+      annotations:
+        checksum/event-bus-configmap: 0e5e9d25a669359a37dd0d684c485f4c05729da5a26a841ad9a2743d99460f73
+    spec:
+      containers:
+        - name: selenium-chrome-node-91
+          image: selenium/node-chrome:4.0.0-rc-1-prerelease-20210618
+          imagePullPolicy: IfNotPresent
+          envFrom:
+            - configMapRef:
+                name: selenium-event-bus-config
+          ports:
+            - containerPort: 5553
+              protocol: TCP
+          volumeMounts:
+            - name: dshm
+              mountPath: /dev/shm
+          resources:
+            limits:
+              cpu: "1"
+              memory: 1Gi
+            requests:
+              cpu: "1"
+              memory: 1Gi
+      volumes:
+        - name: dshm
+          emptyDir:
+            medium: Memory
+            sizeLimit: 1Gi
+---
+# Source: selenium-grid/templates/chrome-node-91-service.yaml
+apiVersion: v1
+kind: Service
+metadata:
+  name: selenium-chrome-node-91
+  namespace: {{NAMESPACE}}
+  labels:
+    name: selenium-chrome-node-91
+    app.kubernetes.io/managed-by: helm
+    app.kubernetes.io/instance: selenium-hpa
+    app.kubernetes.io/version: 4.0.0-beta-1-prerelease-20210114
+    app.kubernetes.io/component: selenium-grid-4.0.0-beta-1-prerelease-20210114
+    helm.sh/chart: selenium-grid-0.2.0
+spec:
+  type: ClusterIP
+  selector:
+    app: selenium-chrome-node-91
+  ports:
+    - name: tcp-chrome
+      protocol: TCP
+      port: 6900
+      targetPort: 5900
+---
+# Source: selenium-grid/templates/chrome-node-91-hpa.yaml
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: selenium-grid-chrome-91-scaledobject
+  namespace: {{NAMESPACE}}
+  labels:
+    deploymentName: selenium-chrome-node-91
+spec:
+  maxReplicaCount: 8
+  scaleTargetRef:
+    name: selenium-chrome-node-91
+  triggers:
+    - type: selenium-grid
+      metadata:
+        url: '{{SELENIUM_GRID_GRAPHQL_URL}}'
+        browserName: 'chrome'
+        browserVersion: '91.0'
+---`
+
+const scaledObjectYaml = `---
+# Source: selenium-grid/templates/chrome-node-hpa.yaml
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: selenium-grid-chrome-scaledobject
+  namespace: {{NAMESPACE}}
+  labels:
+    deploymentName: selenium-chrome-node
+spec:
+  maxReplicaCount: 8
+  scaleTargetRef:
+    name: selenium-chrome-node
+  triggers:
+    - type: selenium-grid
+      metadata:
+        url: '{{SELENIUM_GRID_GRAPHQL_URL}}'
+        browserName: 'chrome'
+---
+# Source: selenium-grid/templates/firefox-node-hpa.yaml
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: selenium-grid-firefox-scaledobject
+  namespace: {{NAMESPACE}}
+  labels:
+    deploymentName: selenium-firefox-node
+spec:
+  maxReplicaCount: 8
+  scaleTargetRef:
+    name: selenium-firefox-node
+  triggers:
+    - type: selenium-grid
+      metadata:
+        url: '{{SELENIUM_GRID_GRAPHQL_URL}}'
+        browserName: 'firefox'`
+
+const seleniumGridTestsYaml = `apiVersion: batch/v1
+kind: Job
+metadata:
+  labels:
+    app: {{JOB_NAME}}
+  name: {{JOB_NAME}}
+spec:
+  template:
+    metadata:
+      labels:
+        app: {{JOB_NAME}}
+    spec:
+      containers:
+      - name: {{CONTAINER_NAME}}
+        image: prashanth0007/selenium-random-tests:v1.0.2
+        imagePullPolicy: Always
+        env:
+        - name: HOST_NAME
+          value: "{{HOST_NAME}}"
+        - name: PORT
+          value: "{{PORT}}"
+        - name: WITH_VERSION
+          value: "{{WITH_VERSION}}"
+      restartPolicy: Never`