Chapter 2 – Testing Throughout the SDLC
Sandwich Integration – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A combination of top-down and bottom-up integration testing.
In simple words
Integrate from both ends toward the middle — hybrid of top-down and bottom-up.
Exam tip
Also called hybrid integration; needs both stubs and drivers.
Related terms
- Integration TestingAfter units work alone, you plug them together and check the seams — API calls, data hand-offs, contracts.
- Top-Down IntegrationIntegrate from the top downward, using stubs for anything not built yet.
- Bottom-Up IntegrationIntegrate from the bottom upward, using drivers to call low-level modules.
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