Despite adopting shift-left testing, a team notices no significant drop in production defects. What is the most probable reason?

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Testing Fundamentals - Testing Models and Approaches

Despite adopting shift-left testing, a team notices no significant drop in production defects. What is the most probable reason?

ATests are created early but lack sufficient coverage or quality

BTesting is performed too early, preventing defect detection

CDevelopers are writing too many automated tests

DShift-left testing eliminates all defects, so this is unlikely

Step-by-Step Solution

Solution:

Step 1: Understand shift-left testing goals
Shift-left aims to find defects early, but effectiveness depends on test quality.
Step 2: Analyze why defects persist
If tests lack coverage or quality, defects remain undetected despite early testing.
Final Answer:
Tests are created early but lack sufficient coverage or quality -> Option A
Quick Check:
Early but poor tests fail to catch bugs [OK]

Quick Trick: Early tests must be thorough to reduce defects [OK]

Common Mistakes:

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