diff --git a/cmd/zz_gen_cmd_dnshelp.go b/cmd/zz_gen_cmd_dnshelp.go
index f2628205..48a3721d 100644
--- a/cmd/zz_gen_cmd_dnshelp.go
+++ b/cmd/zz_gen_cmd_dnshelp.go
@@ -461,7 +461,6 @@ func displayDNSHelp(name string) error {
 		ew.writeln(`	- "OS_PASSWORD":	Password`)
 		ew.writeln(`	- "OS_PROJECT_NAME":	Project name`)
 		ew.writeln(`	- "OS_REGION_NAME":	Region name`)
-		ew.writeln(`	- "OS_TENANT_NAME":	Tenant name (deprecated see OS_PROJECT_NAME and OS_PROJECT_ID)`)
 		ew.writeln(`	- "OS_USERNAME":	Username`)
 		ew.writeln()
 
@@ -470,6 +469,7 @@ func displayDNSHelp(name string) error {
 		ew.writeln(`	- "DESIGNATE_PROPAGATION_TIMEOUT":	Maximum waiting time for DNS propagation`)
 		ew.writeln(`	- "DESIGNATE_TTL":	The TTL of the TXT record used for the DNS challenge`)
 		ew.writeln(`	- "OS_PROJECT_ID":	Project ID`)
+		ew.writeln(`	- "OS_TENANT_NAME":	Tenant name (deprecated see OS_PROJECT_NAME and OS_PROJECT_ID)`)
 
 		ew.writeln()
 		ew.writeln(`More information: https://go-acme.github.io/lego/dns/designate`)
diff --git a/docs/content/dns/zz_gen_designate.md b/docs/content/dns/zz_gen_designate.md
index 5f3815ca..d2e1aab6 100644
--- a/docs/content/dns/zz_gen_designate.md
+++ b/docs/content/dns/zz_gen_designate.md
@@ -33,7 +33,6 @@ _Please contribute by adding a CLI example._
 | `OS_PASSWORD` | Password |
 | `OS_PROJECT_NAME` | Project name |
 | `OS_REGION_NAME` | Region name |
-| `OS_TENANT_NAME` | Tenant name (deprecated see OS_PROJECT_NAME and OS_PROJECT_ID) |
 | `OS_USERNAME` | Username |
 
 The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
@@ -48,6 +47,7 @@ More information [here](/lego/dns/#configuration-and-credentials).
 | `DESIGNATE_PROPAGATION_TIMEOUT` | Maximum waiting time for DNS propagation |
 | `DESIGNATE_TTL` | The TTL of the TXT record used for the DNS challenge |
 | `OS_PROJECT_ID` | Project ID |
+| `OS_TENANT_NAME` | Tenant name (deprecated see OS_PROJECT_NAME and OS_PROJECT_ID) |
 
 The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
 More information [here](/lego/dns/#configuration-and-credentials).
diff --git a/providers/dns/designate/designate.go b/providers/dns/designate/designate.go
index 99785fb4..c007932b 100644
--- a/providers/dns/designate/designate.go
+++ b/providers/dns/designate/designate.go
@@ -63,7 +63,7 @@ type DNSProvider struct {
 
 // NewDNSProvider returns a DNSProvider instance configured for Designate.
 // Credentials must be passed in the environment variables:
-// OS_AUTH_URL, OS_USERNAME, OS_PASSWORD, OS_TENANT_NAME, OS_REGION_NAME.
+// OS_AUTH_URL, OS_USERNAME, OS_PASSWORD, OS_REGION_NAME.
 // Or you can specify OS_CLOUD to read the credentials from the according cloud entry.
 func NewDNSProvider() (*DNSProvider, error) {
 	config := NewDefaultConfig()
@@ -80,7 +80,7 @@ func NewDNSProvider() (*DNSProvider, error) {
 
 		config.opts = *opts
 	} else {
-		_, err = env.Get(EnvAuthURL, EnvUsername, EnvPassword, EnvTenantName, EnvRegionName)
+		_, err = env.Get(EnvAuthURL, EnvUsername, EnvPassword, EnvRegionName)
 		if err != nil {
 			return nil, fmt.Errorf("designate: %w", err)
 		}
diff --git a/providers/dns/designate/designate.toml b/providers/dns/designate/designate.toml
index 697a8f77..396a5b58 100644
--- a/providers/dns/designate/designate.toml
+++ b/providers/dns/designate/designate.toml
@@ -12,10 +12,10 @@ Example = ''''''
     OS_USERNAME = "Username"
     OS_PASSWORD = "Password"
     OS_PROJECT_NAME = "Project name"
-    OS_TENANT_NAME = "Tenant name (deprecated see OS_PROJECT_NAME and OS_PROJECT_ID)"
     OS_REGION_NAME = "Region name"
   [Configuration.Additional]
     OS_PROJECT_ID = "Project ID"
+    OS_TENANT_NAME = "Tenant name (deprecated see OS_PROJECT_NAME and OS_PROJECT_ID)"
     DESIGNATE_POLLING_INTERVAL = "Time between DNS propagation check"
     DESIGNATE_PROPAGATION_TIMEOUT = "Maximum waiting time for DNS propagation"
     DESIGNATE_TTL = "The TTL of the TXT record used for the DNS challenge"
diff --git a/providers/dns/designate/designate_test.go b/providers/dns/designate/designate_test.go
index ce4c49c4..5cf276b3 100644
--- a/providers/dns/designate/designate_test.go
+++ b/providers/dns/designate/designate_test.go
@@ -45,8 +45,7 @@ func TestNewDNSProvider_fromEnv(t *testing.T) {
 				EnvUsername:   "B",
 				EnvPassword:   "C",
 				EnvRegionName: "D",
-				EnvTenantName: "E",
-				EnvProjectID:  "F",
+				EnvProjectID:  "E",
 			},
 		},
 		{
@@ -56,9 +55,8 @@ func TestNewDNSProvider_fromEnv(t *testing.T) {
 				EnvUsername:   "",
 				EnvPassword:   "",
 				EnvRegionName: "",
-				EnvTenantName: "",
 			},
-			expected: "designate: some credentials information are missing: OS_AUTH_URL,OS_USERNAME,OS_PASSWORD,OS_TENANT_NAME,OS_REGION_NAME",
+			expected: "designate: some credentials information are missing: OS_AUTH_URL,OS_USERNAME,OS_PASSWORD,OS_REGION_NAME",
 		},
 		{
 			desc: "missing auth url",
@@ -67,7 +65,6 @@ func TestNewDNSProvider_fromEnv(t *testing.T) {
 				EnvUsername:   "B",
 				EnvPassword:   "C",
 				EnvRegionName: "D",
-				EnvTenantName: "E",
 			},
 			expected: "designate: some credentials information are missing: OS_AUTH_URL",
 		},
@@ -78,7 +75,6 @@ func TestNewDNSProvider_fromEnv(t *testing.T) {
 				EnvUsername:   "",
 				EnvPassword:   "C",
 				EnvRegionName: "D",
-				EnvTenantName: "E",
 			},
 			expected: "designate: some credentials information are missing: OS_USERNAME",
 		},
@@ -89,7 +85,6 @@ func TestNewDNSProvider_fromEnv(t *testing.T) {
 				EnvUsername:   "B",
 				EnvPassword:   "",
 				EnvRegionName: "D",
-				EnvTenantName: "E",
 			},
 			expected: "designate: some credentials information are missing: OS_PASSWORD",
 		},
@@ -100,21 +95,9 @@ func TestNewDNSProvider_fromEnv(t *testing.T) {
 				EnvUsername:   "B",
 				EnvPassword:   "C",
 				EnvRegionName: "",
-				EnvTenantName: "E",
 			},
 			expected: "designate: some credentials information are missing: OS_REGION_NAME",
 		},
-		{
-			desc: "missing tenant name",
-			envVars: map[string]string{
-				EnvAuthURL:    server.URL + "/v2.0/",
-				EnvUsername:   "B",
-				EnvPassword:   "C",
-				EnvRegionName: "D",
-				EnvTenantName: "",
-			},
-			expected: "designate: some credentials information are missing: OS_TENANT_NAME",
-		},
 	}
 
 	for _, test := range testCases {
@@ -307,7 +290,7 @@ func getServer(t *testing.T) *httptest.Server {
 		"user": {
 			"name": "a",
 			"roles": [ ],
-			"role_links": [ ] 
+			"role_links": [ ]
 		},
 		"serviceCatalog": [
 			{