diff --git a/pkg/scalers/prometheus_scaler_test.go b/pkg/scalers/prometheus_scaler_test.go
index eb280877b29..f1a966e2b76 100644
--- a/pkg/scalers/prometheus_scaler_test.go
+++ b/pkg/scalers/prometheus_scaler_test.go
@@ -19,15 +19,15 @@ type prometheusMetricIdentifier struct {
 var testPromMetadata = []parsePrometheusMetadataTestData{
 	{map[string]string{}, true},
 	// all properly formed
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true"}, false},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up"}, false},
 	// missing serverAddress
-	{map[string]string{"serverAddress": "", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true"}, true},
+	{map[string]string{"serverAddress": "", "metricName": "http_requests_total", "threshold": "100", "query": "up"}, true},
 	// missing metricName
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "", "threshold": "100", "query": "up", "disableScaleToZero": "true"}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "", "threshold": "100", "query": "up"}, true},
 	// malformed threshold
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "one", "query": "up", "disableScaleToZero": "true"}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "one", "query": "up"}, true},
 	// missing query
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "", "disableScaleToZero": "true"}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": ""}, true},
 	// all properly formed, default disableScaleToZero
 	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up"}, false},
 }
@@ -44,25 +44,25 @@ type prometheusAuthMetadataTestData struct {
 
 var testPrometheusAuthMetadata = []prometheusAuthMetadataTestData{
 	// success TLS
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "tls"}, map[string]string{"ca": "caaa", "cert": "ceert", "key": "keey"}, false},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "tls"}, map[string]string{"ca": "caaa", "cert": "ceert", "key": "keey"}, false},
 	// TLS, ca is optional
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "tls"}, map[string]string{"cert": "ceert", "key": "keey"}, false},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "tls"}, map[string]string{"cert": "ceert", "key": "keey"}, false},
 	// fail TLS, key not given
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "tls"}, map[string]string{"ca": "caaa", "cert": "ceert"}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "tls"}, map[string]string{"ca": "caaa", "cert": "ceert"}, true},
 	// fail TLS, cert not given
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "tls"}, map[string]string{"ca": "caaa", "key": "keey"}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "tls"}, map[string]string{"ca": "caaa", "key": "keey"}, true},
 	// success bearer default
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "bearer"}, map[string]string{"bearerToken": "tooooken"}, false},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "bearer"}, map[string]string{"bearerToken": "tooooken"}, false},
 	// fail bearerAuth with no token
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "bearer"}, map[string]string{}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "bearer"}, map[string]string{}, true},
 	// success basicAuth
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "basic"}, map[string]string{"username": "user", "password": "pass"}, false},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "basic"}, map[string]string{"username": "user", "password": "pass"}, false},
 	// fail basicAuth with no username
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "basic"}, map[string]string{}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "basic"}, map[string]string{}, true},
 
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "tls, basic"}, map[string]string{"ca": "caaa", "cert": "ceert", "key": "keey", "username": "user", "password": "pass"}, false},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "tls, basic"}, map[string]string{"ca": "caaa", "cert": "ceert", "key": "keey", "username": "user", "password": "pass"}, false},
 
-	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "disableScaleToZero": "true", "authModes": "tls,basic"}, map[string]string{"username": "user", "password": "pass"}, true},
+	{map[string]string{"serverAddress": "http://localhost:9090", "metricName": "http_requests_total", "threshold": "100", "query": "up", "authModes": "tls,basic"}, map[string]string{"username": "user", "password": "pass"}, true},
 }
 
 func TestPrometheusParseMetadata(t *testing.T) {