diff --git a/lib/compress/clevels.h b/lib/compress/clevels.h
index c18da465f32..bc596e6367a 100644
--- a/lib/compress/clevels.h
+++ b/lib/compress/clevels.h
@@ -31,7 +31,7 @@ static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEV
     { 21, 16, 17,  1,  5,  0, ZSTD_dfast   },  /* level  3 */
     { 21, 18, 18,  1,  5,  0, ZSTD_dfast   },  /* level  4 */
     { 21, 18, 19,  3,  5,  2, ZSTD_greedy  },  /* level  5 */
-    { 21, 18, 19,  3,  5,  4, ZSTD_lazy    },  /* level  6 */
+    { 21, 18, 19,  2,  5,  2, ZSTD_lazy    },  /* level  6 */
     { 21, 19, 20,  4,  5,  8, ZSTD_lazy    },  /* level  7 */
     { 21, 19, 20,  4,  5, 16, ZSTD_lazy2   },  /* level  8 */
     { 22, 20, 21,  4,  5, 16, ZSTD_lazy2   },  /* level  9 */
@@ -57,7 +57,7 @@ static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEV
     { 18, 16, 16,  1,  4,  0, ZSTD_dfast   },  /* level  3 */
     { 18, 16, 17,  3,  5,  2, ZSTD_greedy  },  /* level  4.*/
     { 18, 17, 18,  5,  5,  2, ZSTD_greedy  },  /* level  5.*/
-    { 18, 18, 19,  3,  5,  4, ZSTD_lazy    },  /* level  6.*/
+    { 18, 18, 19,  3,  5,  3, ZSTD_lazy    },  /* level  6.*/
     { 18, 18, 19,  4,  4,  4, ZSTD_lazy    },  /* level  7 */
     { 18, 18, 19,  4,  4,  8, ZSTD_lazy2   },  /* level  8 */
     { 18, 18, 19,  5,  4,  8, ZSTD_lazy2   },  /* level  9 */
diff --git a/tests/cli-tests/determinism/basic.sh.stdout.exact b/tests/cli-tests/determinism/basic.sh.stdout.exact
index bb1723b15f2..306ed72a2f8 100644
--- a/tests/cli-tests/determinism/basic.sh.stdout.exact
+++ b/tests/cli-tests/determinism/basic.sh.stdout.exact
@@ -227,7 +227,7 @@ level 6, file files/g10000-P90
 level 6, file files/g100000
 350a0f07d7ddbcd0c629da0bcf734f02
 level 6, file files/g1000000
-d40c700beee149ab272b94c7ef0f3811
+6046876a9c90abf183575ec2fa51ea84
 level 6, file files/g20000
 335bc3f5767a7d4ad479408b0e289459
 level 6, file files/g200000
@@ -237,7 +237,7 @@ a4b9fed2e1005298617125ee3b00cb06
 level 6, file files/g50000
 d7b3dab8d19fb992795c440d5f953c94
 level 6, file files/g500000
-44e59ccbf7a9794d4ea03f3f59f61ffd
+a4028c1659d9155e6b5c86caaf28e507
 level 7, file files/g0
 5d80401e01d33084c65e94f93351e94c
 level 7, file files/g1