diff --git a/infra/base-images/base-runner/coverage b/infra/base-images/base-runner/coverage
index df8c3d15152a..35cf236d0739 100755
--- a/infra/base-images/base-runner/coverage
+++ b/infra/base-images/base-runner/coverage
@@ -69,7 +69,9 @@ TIMEOUT=1h
 objects=""
 
 # Number of CPUs available, this is needed for running tests in parallel.
+# Set the max number of parallel jobs to be the CPU count and a max of 10.
 NPROC=$(nproc)
+MAX_PARALLEL_COUNT=10
 
 CORPUS_DIR=${CORPUS_DIR:-"/corpus"}
 
@@ -364,9 +366,9 @@ for fuzz_target in $FUZZ_TARGETS; do
   fi
 
 
-  # Do not spawn more processes than the number of CPUs available.
+  # Limit the number of processes to be spawned.
   n_child_proc=$(jobs -rp | wc -l)
-  while [ "$n_child_proc" -eq "$NPROC" ]; do
+  while [[ "$n_child_proc" -eq "$NPROC" || "$n_child_proc" -gt "$MAX_PARALLEL_COUNT" ]]; do
     sleep 4
     n_child_proc=$(jobs -rp | wc -l)
   done