diff --git a/icu4c/source/test/cintltst/ccapitst.c b/icu4c/source/test/cintltst/ccapitst.c
index 1db50a30c68..7a316856ad8 100644
--- a/icu4c/source/test/cintltst/ccapitst.c
+++ b/icu4c/source/test/cintltst/ccapitst.c
@@ -1322,7 +1322,7 @@ static void TestConvertSafeCloneCallback()
     conv1 = ucnv_open("iso-8859-3", &err);
     
     if(U_FAILURE(err)) {
-        log_err("Err opening iso-8859-3, %s", u_errorName(err));
+        log_data_err("Err opening iso-8859-3, %s", u_errorName(err));
         return;
     }
 
diff --git a/icu4c/source/test/cintltst/nucnvtst.c b/icu4c/source/test/cintltst/nucnvtst.c
index 3067d45103c..6178f685b78 100644
--- a/icu4c/source/test/cintltst/nucnvtst.c
+++ b/icu4c/source/test/cintltst/nucnvtst.c
@@ -2716,7 +2716,7 @@ TestHZ() {
     int32_t* myOff= offsets;
     cnv=ucnv_open("HZ", &errorCode);
     if(U_FAILURE(errorCode)) {
-        log_err("Unable to open HZ converter: %s\n", u_errorName(errorCode));
+        log_data_err("Unable to open HZ converter: %s\n", u_errorName(errorCode));
         return;
     }