diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e7f7aa5172e082..046e678f8c1b4b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -655,11 +655,14 @@ jobs:
       matrix:
         sanitizer:
         - address
-        - undefined
-        - memory
         oss-fuzz-project-name:
         - cpython3
         - python3-libraries
+        include:
+        - sanitizer: undefined
+          oss-fuzz-project-name: cpython3
+        - sanitizer: memory
+          oss-fuzz-project-name: cpython3
         exclude:
         # Note that the 'no-exclude' sentinel below is to prevent
         # an empty string value from excluding all jobs and causing