When testing a template’s behavior, avoid overriding it with explicit parameter values. Remove parameter values from the parameters file so the template’s `defaultValue(s)` are used, ensuring the default-path is actually exercised. Example (parameters file): ```json { "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentParameters.json#", "contentVersion": "1.0.0.0", "parameters": { "someParam": { "// omit "value" here to use template defaultValue" } } } ``` Only provide `value` fields when intentionally testing non-default behavior; otherwise leave them out to validate defaults.