diff --git a/tests/profiles/generate_profiles.py b/tests/profiles/generate_profiles.py
index c24901865..1ea3115c5 100644
--- a/tests/profiles/generate_profiles.py
+++ b/tests/profiles/generate_profiles.py
@@ -32,13 +32,18 @@ def _yaml_inline(value: Any) -> str:
     """Render *value* for inline YAML.
 
     * Dicts (e.g. bigquery keyfile) → compact ``{key: val, …}``
+    * Multi-line strings (e.g. PEM private keys) → double-quoted scalar with
+      escaped newlines so the rendered profiles.yml stays parseable inline.
     * Undefined (docker-only, no secrets) → empty string ``''``
-    * Everything else → pass through as-is
+    * Everything else (incl. single-line strings) → pass through as-is so
+      adapter-side type coercion still works (e.g. ``port: 5439`` stays an int).
     """
     if isinstance(value, Undefined):
         return "''"
     if isinstance(value, dict):
         return yaml.dump(value, default_flow_style=True).strip()
+    if isinstance(value, str) and "\n" in value:
+        return yaml.dump(value, default_flow_style=True, default_style='"').strip()
     return value
 
 
diff --git a/tests/profiles/profiles.yml.j2 b/tests/profiles/profiles.yml.j2
index 32167402f..4bb0b4609 100644
--- a/tests/profiles/profiles.yml.j2
+++ b/tests/profiles/profiles.yml.j2
@@ -104,7 +104,10 @@ elementary_tests:
       type: snowflake
       account: {{ snowflake_account | toyaml }}
       user: {{ snowflake_user | toyaml }}
-      password: {{ snowflake_password | toyaml }}
+      private_key: {{ snowflake_private_key | toyaml }}
+      {%- if snowflake_private_key_passphrase is defined and snowflake_private_key_passphrase %}
+      private_key_passphrase: {{ snowflake_private_key_passphrase | toyaml }}
+      {%- endif %}
       role: {{ snowflake_role | toyaml }}
       database: {{ snowflake_database | toyaml }}
       warehouse: {{ snowflake_warehouse | toyaml }}