23 files declare their use of ImageEffectsTestBase in Image Effects 8.2

AspectSwitcherTest.php in tests/src/Functional/Effect/AspectSwitcherTest.php

AutoOrientTest.php in tests/src/Functional/Effect/AutoOrientTest.php

BackgroundTest.php in tests/src/Functional/Effect/BackgroundTest.php

BrightnessTest.php in tests/src/Functional/Effect/BrightnessTest.php

ColorShiftTest.php in tests/src/Functional/Effect/ColorShiftTest.php

ContrastTest.php in tests/src/Functional/Effect/ContrastTest.php

ConvolutionSharpenTest.php in tests/src/Functional/Effect/ConvolutionSharpenTest.php

ConvolutionTest.php in tests/src/Functional/Effect/ConvolutionTest.php

GaussianBlurTest.php in tests/src/Functional/Effect/GaussianBlurTest.php

ImagemagickArgumentsTest.php in tests/src/Functional/Effect/ImagemagickArgumentsTest.php

InterlaceTest.php in tests/src/Functional/Effect/InterlaceTest.php

InvertTest.php in tests/src/Functional/Effect/InvertTest.php

MaskTest.php in tests/src/Functional/Effect/MaskTest.php

MirrorTest.php in tests/src/Functional/Effect/MirrorTest.php

OpacityTest.php in tests/src/Functional/Effect/OpacityTest.php

ResizePercentageTest.php in tests/src/Functional/Effect/ResizePercentageTest.php

ScaleAndSmartCropTest.php in tests/src/Functional/Effect/ScaleAndSmartCropTest.php

SetCanvasTest.php in tests/src/Functional/Effect/SetCanvasTest.php

SetTransparentColorTest.php in tests/src/Functional/Effect/SetTransparentColorTest.php

SmartCropTest.php in tests/src/Functional/Effect/SmartCropTest.php

StripMetadataTest.php in tests/src/Functional/Effect/StripMetadataTest.php

TextOverlayTest.php in tests/src/Functional/Effect/TextOverlayTest.php

WatermarkTest.php in tests/src/Functional/Effect/WatermarkTest.php