diff --git a/winsup/testsuite/winsup.api/ltp/mmap02.c b/winsup/testsuite/winsup.api/ltp/mmap02.c
index 33a12738c..b96bdb452 100644
--- a/winsup/testsuite/winsup.api/ltp/mmap02.c
+++ b/winsup/testsuite/winsup.api/ltp/mmap02.c
@@ -225,7 +225,7 @@ setup()
 	}
 
 	/* Write test buffer contents into temporary file */
-	if (write(fildes, tst_buff, sizeof(tst_buff)) < (int)sizeof(tst_buff)) {
+	if (write(fildes, tst_buff, page_sz) < page_sz) {
 		tst_brkm(TFAIL, NULL, "write() on %s Failed, errno=%d : %s",
 			 TEMPFILE, errno, strerror(errno));
 		free(tst_buff);
diff --git a/winsup/testsuite/winsup.api/ltp/mmap03.c b/winsup/testsuite/winsup.api/ltp/mmap03.c
index 9302d335d..fba512c28 100644
--- a/winsup/testsuite/winsup.api/ltp/mmap03.c
+++ b/winsup/testsuite/winsup.api/ltp/mmap03.c
@@ -225,7 +225,7 @@ setup()
 	}
 
 	/* Write test buffer contents into temporary file */
-	if (write(fildes, tst_buff, strlen(tst_buff)) < (int)strlen(tst_buff)) {
+	if (write(fildes, tst_buff, page_sz) < page_sz) {
 		tst_brkm(TFAIL, NULL, "write() on %s Failed, errno=%d : %s",
 			 TEMPFILE, errno, strerror(errno));
 		free(tst_buff);
diff --git a/winsup/testsuite/winsup.api/ltp/mmap04.c b/winsup/testsuite/winsup.api/ltp/mmap04.c
index 64d3a8ebe..dbe25aefd 100644
--- a/winsup/testsuite/winsup.api/ltp/mmap04.c
+++ b/winsup/testsuite/winsup.api/ltp/mmap04.c
@@ -225,7 +225,7 @@ setup()
 	}
 
 	/* Write test buffer contents into temporary file */
-	if (write(fildes, tst_buff, strlen(tst_buff)) < (int)strlen(tst_buff)) {
+	if (write(fildes, tst_buff, page_sz) < page_sz) {
 		tst_brkm(TFAIL, NULL, "write() on %s Failed, errno=%d : %s",
 			 TEMPFILE, errno, strerror(errno));
 		free(tst_buff);
diff --git a/winsup/testsuite/winsup.api/ltp/mmap05.c b/winsup/testsuite/winsup.api/ltp/mmap05.c
index bcdfd0cd8..6e75ee222 100644
--- a/winsup/testsuite/winsup.api/ltp/mmap05.c
+++ b/winsup/testsuite/winsup.api/ltp/mmap05.c
@@ -228,8 +228,7 @@ setup()
 	}
 
 	/* Write test buffer contents into temporary file */
-	if (write(fildes, tst_buff, strlen(tst_buff))
-	    != (int)strlen(tst_buff)) {
+	if (write(fildes, tst_buff, page_sz) != page_sz) {
 		tst_brkm(TFAIL, NULL, "write() on %s Failed, errno=%d : %s",
 			 TEMPFILE, errno, strerror(errno));
 		free(tst_buff);
diff --git a/winsup/testsuite/winsup.api/ltp/mmap06.c b/winsup/testsuite/winsup.api/ltp/mmap06.c
index ec113c077..c099f8c33 100644
--- a/winsup/testsuite/winsup.api/ltp/mmap06.c
+++ b/winsup/testsuite/winsup.api/ltp/mmap06.c
@@ -197,7 +197,7 @@ setup()
 	}
 
 	/* Write test buffer contents into temporary file */
-	if (write(fildes, tst_buff, strlen(tst_buff)) < (int)strlen(tst_buff)) {
+	if (write(fildes, tst_buff, page_sz) < page_sz) {
 		tst_brkm(TFAIL, NULL,
 			 "write() on %s Failed, errno=%d : %s",
 			 TEMPFILE, errno, strerror(errno));
diff --git a/winsup/testsuite/winsup.api/ltp/mmap07.c b/winsup/testsuite/winsup.api/ltp/mmap07.c
index ab989f443..6e3bb5112 100644
--- a/winsup/testsuite/winsup.api/ltp/mmap07.c
+++ b/winsup/testsuite/winsup.api/ltp/mmap07.c
@@ -198,7 +198,7 @@ setup()
 	}
 
 	/* Write test buffer contents into temporary file */
-	if (write(fildes, tst_buff, strlen(tst_buff)) < (int)strlen(tst_buff)) {
+	if (write(fildes, tst_buff, page_sz) < page_sz) {
 		tst_brkm(TFAIL, NULL, "write() on %s Failed, errno=%d : %s",
 			 TEMPFILE, errno, strerror(errno));
 		free(tst_buff);