diff --git a/cmake/Modules/LocalFuzztest.cmake b/cmake/Modules/LocalFuzztest.cmake
index 22b9b80645..b193f73e8d 100644
--- a/cmake/Modules/LocalFuzztest.cmake
+++ b/cmake/Modules/LocalFuzztest.cmake
@@ -5,6 +5,7 @@ set(FUZZTEST_SOURCE_DIR "${AVIF_SOURCE_DIR}/ext/fuzztest")
 if(EXISTS "${FUZZTEST_SOURCE_DIR}")
     message(STATUS "libavif(AVIF_FUZZTEST=LOCAL): folder found at ${FUZZTEST_SOURCE_DIR}")
     set(FUZZTEST_BINARY_DIR "${FUZZTEST_SOURCE_DIR}/build.libavif")
+    add_subdirectory(${FUZZTEST_SOURCE_DIR} ${FUZZTEST_BINARY_DIR} EXCLUDE_FROM_ALL)
 else()
     message(STATUS "libavif(AVIF_FUZZTEST=LOCAL): compiled library not found at ${LIB_FILENAME}; using FetchContent")
 
@@ -26,7 +27,7 @@ else()
             && sed -i.bak -e "s/set(GTEST_HAS_ABSL ON)/set(GTEST_HAS_ABSL OFF)/" cmake/BuildDependencies.cmake
     )
 
+    avif_fetchcontent_populate_cmake(fuzztest)
+
     message(CHECK_PASS "complete")
 endif()
-
-avif_fetchcontent_populate_cmake(fuzztest)
diff --git a/tests/oss-fuzz/build.sh b/tests/oss-fuzz/build.sh
index ce3787755f..32aa516c8d 100755
--- a/tests/oss-fuzz/build.sh
+++ b/tests/oss-fuzz/build.sh
@@ -62,7 +62,7 @@ if [[ "$SANITIZER" == "memory" ]]; then
 fi
 
 # Prepare dependencies.
-cd ext && bash aom.cmd && bash dav1d.cmd && bash fuzztest.cmd && bash libjpeg.cmd &&
+cd ext && bash aom.cmd && bash dav1d.cmd && bash libjpeg.cmd &&
       bash libsharpyuv.cmd && bash libyuv.cmd && bash zlibpng.cmd && cd ..
 
 # build libavif