diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index edcf1b64f..5a5148e90 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -2019,7 +2019,8 @@ ZSTD_resetCCtx_byAttachingCDict(ZSTD_CCtx* cctx,
                         U64 pledgedSrcSize,
                         ZSTD_buffered_policy_e zbuff)
 {
-    DEBUGLOG(4, "ZSTD_resetCCtx_byAttachingCDict() pledgedSrcSize=%zu", pledgedSrcSize);
+    DEBUGLOG(4, "ZSTD_resetCCtx_byAttachingCDict() pledgedSrcSize=%llu",
+                (unsigned long long)pledgedSrcSize);
     {
         ZSTD_compressionParameters adjusted_cdict_cParams = cdict->matchState.cParams;
         unsigned const windowLog = params.cParams.windowLog;
@@ -2081,7 +2082,8 @@ static size_t ZSTD_resetCCtx_byCopyingCDict(ZSTD_CCtx* cctx,
     const ZSTD_compressionParameters *cdict_cParams = &cdict->matchState.cParams;
 
     assert(!cdict->matchState.dedicatedDictSearch);
-    DEBUGLOG(4, "ZSTD_resetCCtx_byCopyingCDict() pledgedSrcSize=%zu", pledgedSrcSize);
+    DEBUGLOG(4, "ZSTD_resetCCtx_byCopyingCDict() pledgedSrcSize=%llu",
+                (unsigned long long)pledgedSrcSize);
 
     {   unsigned const windowLog = params.cParams.windowLog;
         assert(windowLog != 0);
diff --git a/tests/Makefile b/tests/Makefile
index c4d1472d0..079151d2f 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -24,7 +24,7 @@ PRGDIR  = ../programs
 PYTHON ?= python3
 TESTARTEFACT := versionsTest
 
-DEBUGLEVEL ?= 1
+DEBUGLEVEL ?= 2
 export DEBUGLEVEL  # transmit value to sub-makefiles
 DEBUGFLAGS  = -g -DDEBUGLEVEL=$(DEBUGLEVEL)
 CPPFLAGS   += -I$(ZSTDDIR) -I$(ZSTDDIR)/common -I$(ZSTDDIR)/compress \