diff --git a/homeassistant/components/dexcom/config_flow.py b/homeassistant/components/dexcom/config_flow.py
index e2ce9e49186..26c0c92ca78 100644
--- a/homeassistant/components/dexcom/config_flow.py
+++ b/homeassistant/components/dexcom/config_flow.py
@@ -46,9 +46,9 @@ class DexcomConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                     user_input[CONF_SERVER] == SERVER_OUS,
                 )
             except SessionError:
-                errors["base"] = "session_error"
+                errors["base"] = "cannot_connect"
             except AccountError:
-                errors["base"] = "account_error"
+                errors["base"] = "invalid_auth"
             except Exception:  # pylint: disable=broad-except
                 errors["base"] = "unknown"
 
diff --git a/homeassistant/components/dexcom/strings.json b/homeassistant/components/dexcom/strings.json
index 7b9932ec4de..bb29f814ee8 100644
--- a/homeassistant/components/dexcom/strings.json
+++ b/homeassistant/components/dexcom/strings.json
@@ -12,11 +12,13 @@
       }
     },
     "error": {
-      "session_error": "[%key:common::config_flow::error::cannot_connect%]",
-      "account_error": "[%key:common::config_flow::error::invalid_auth%]",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
+      "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
-    "abort": { "already_configured_account": "[%key:common::config_flow::abort::already_configured_account%]" }
+    "abort": {
+      "already_configured_account": "[%key:common::config_flow::abort::already_configured_account%]"
+    }
   },
   "options": {
     "step": {
diff --git a/tests/components/dexcom/test_config_flow.py b/tests/components/dexcom/test_config_flow.py
index b95f796b230..6f6d8abe8f9 100644
--- a/tests/components/dexcom/test_config_flow.py
+++ b/tests/components/dexcom/test_config_flow.py
@@ -57,7 +57,7 @@ async def test_form_account_error(hass):
         )
 
     assert result2["type"] == data_entry_flow.RESULT_TYPE_FORM
-    assert result2["errors"] == {"base": "account_error"}
+    assert result2["errors"] == {"base": "invalid_auth"}
 
 
 async def test_form_session_error(hass):
@@ -76,7 +76,7 @@ async def test_form_session_error(hass):
         )
 
     assert result2["type"] == data_entry_flow.RESULT_TYPE_FORM
-    assert result2["errors"] == {"base": "session_error"}
+    assert result2["errors"] == {"base": "cannot_connect"}
 
 
 async def test_form_unknown_error(hass):