diff --git a/.github/workflows/generic-dev.yml b/.github/workflows/generic-dev.yml
index 87b2507284a..d4406a115d6 100644
--- a/.github/workflows/generic-dev.yml
+++ b/.github/workflows/generic-dev.yml
@@ -144,6 +144,15 @@ jobs:
         make clean
         make -j msanregressiontest
 
+  asan-ubsan-testzstd:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: ASan + UBSan + Test
+      run: |
+        make clean
+        make -j uasan-test-zstd
+
   cpp-gnu90-c99-compatibility:
     runs-on: ubuntu-latest
     steps:
diff --git a/grep b/grep
new file mode 100644
index 00000000000..14bfe0f0b3e
Binary files /dev/null and b/grep differ
diff --git a/tests/playTests.sh b/tests/playTests.sh
index 2dfb4fa07ac..4ffc3bb2ea5 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -1437,6 +1437,16 @@ cat tmp_patch | zstd -f --patch-from=tmp_dict -c -o tmp_patch_diff && die
 cat tmp_patch | zstd -f --patch-from=tmp_dict --stream-size=1000 -c -o tmp_patch_diff
 rm -rf tmp*
 
+println "\n===>   large files single-threaded tests across all strategies 1-7 (fast to opt) "
+
+roundTripTest -g4000M -P99 " --zstd=strategy=1 --single-thread"
+roundTripTest -g4000M -P99 " --zstd=strategy=2 --single-thread"
+roundTripTest -g4000M -P99 " --zstd=strategy=3 --single-thread"
+roundTripTest -g4000M -P99 " --zstd=strategy=4 --single-thread"
+roundTripTest -g4000M -P99 " --zstd=strategy=5 --single-thread"
+roundTripTest -g4000M -P99 " --zstd=strategy=6 --single-thread"
+roundTripTest -g4000M -P99 " --zstd=strategy=7 --single-thread"
+
 println "\n===>   large files tests "
 
 roundTripTest -g270000000 1