test-mule-config.xml

<mule xmlns="http://www.mulesoft.org/schema/mule/core"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xmlns:aws-secrets-properties-provider="http://www.mulesoft.org/schema/mule/aws-secrets-properties-provider"
      xsi:schemaLocation="http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
      http://www.mulesoft.org/schema/mule/aws-secrets-properties-provider http://www.mulesoft.org/schema/mule/aws-secrets-properties-provider/current/mule-aws-secrets-properties-provider.xsd">

    <aws-secrets-properties-provider:config name="Aws_Secrets_Properties_Provider_Config"  region="${aws.region}" secretKey="${aws.secretKey}" accessKey="${aws.accessKey}" />

    <flow name="standardSecretFlow">
        <set-payload value="${aws-secret::dev/adamsecret}" />
    </flow>

    <flow name="jsonSecretFlow">
        <set-payload value="${aws-secret::dev/adamsecretc}" />
    </flow>

    <flow name="jsonSecretFlowUsername">
        <set-payload value="${aws-secret::dev/adamsecretc#username}/${aws-secret::dev/adamsecretc#password}" />
    </flow>

</mule>