diff --git a/tests/Makefile b/tests/Makefile
index fc62b9e26..95c33bc4b 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -316,9 +316,9 @@ test-zbuff32: zbufftest32
 
 test-zstream: zstreamtest
 	$(QEMU_SYS) ./zstreamtest $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
-	$(QEMU_SYS) ./zstreamtest --mt $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
-	$(QEMU_SYS) ./zstreamtest --newapi $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
-	$(QEMU_SYS) ./zstreamtest --opaqueapi $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
+	$(QEMU_SYS) ./zstreamtest --mt -t1 $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
+	$(QEMU_SYS) ./zstreamtest --newapi -t1 $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
+	$(QEMU_SYS) ./zstreamtest --opaqueapi -t1 $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
 
 test-zstream32: zstreamtest32
 	$(QEMU_SYS) ./zstreamtest32 $(ZSTREAM_TESTTIME) $(FUZZER_FLAGS)
diff --git a/tests/zstreamtest.c b/tests/zstreamtest.c
index 16f514425..8b4c83694 100644
--- a/tests/zstreamtest.c
+++ b/tests/zstreamtest.c
@@ -175,7 +175,8 @@ static int basicUnitTests(U32 seed, double compressibility, ZSTD_customMem custo
     RDG_genBuffer(CNBuffer, CNBufferSize, compressibility, 0., seed);
 
     /* Create dictionary */
-    dictionary = FUZ_createDictionary(CNBuffer, CNBufferSize, 4 KB, 40 KB);
+    DISPLAYLEVEL(3, "creating dictionary for unit tests \n");
+    dictionary = FUZ_createDictionary(CNBuffer, CNBufferSize / 2, 8 KB, 40 KB);
     if (!dictionary.start) {
         DISPLAY("Error creating dictionary, aborting \n");
         goto _output_error;