diff --git a/tools/test/iconv/gnu/gnu.c b/tools/test/iconv/gnu/gnu.c
--- a/tools/test/iconv/gnu/gnu.c
+++ b/tools/test/iconv/gnu/gnu.c
@@ -243,8 +243,8 @@
 	struct iconv_hooks hooks;
 	iconv_t cd;
 	size_t inbytesleft = 15, outbytesleft = 40;
-	const char **inptr;
-	const char *s = "Hello World!";
+	char **inptr;
+	char *s = "Hello World!";
 	char **outptr;
 	char *outbuf;
 
@@ -273,8 +273,8 @@
 	struct iconv_hooks hooks;
 	iconv_t cd;
 	size_t inbytesleft, outbytesleft = 40;
-	const char **inptr;
-	const char *s = "Hello World!";
+	char **inptr;
+	char *s = "Hello World!";
 	char **outptr;
 	char *outbuf;
 
@@ -350,7 +350,7 @@
 	size_t inbytesleft, outbytesleft;
 	uint16_t inbuf[1] = { 0xF187 };
 	uint8_t outbuf[4] = { 0x00, 0x00, 0x00, 0x00 };
-	const char *inptr;
+	char *inptr;
 	char *outptr;
 	int ret;
 
@@ -366,7 +366,7 @@
 	if (iconvctl(cd, ICONV_SET_FALLBACKS, (void *)&fb) != 0)
 		return (1);
 
-	inptr = (const char *)inbuf;
+	inptr = (char *)inbuf;
 	outptr = (char *)outbuf;
 	inbytesleft = 2;
 	outbytesleft = 4;
@@ -389,7 +389,7 @@
 {
 	iconv_allocation_t *myspace;
 	size_t inbytesleft, outbytesleft;
-	const char *inptr;
+	char *inptr;
 	char *inbuf = "works!", *outptr;
 	char outbuf[6];
 
@@ -398,7 +398,7 @@
 	if (iconv_open_into("ASCII", "ASCII", myspace) == -1)
 		return (1);
 
-	inptr = (const char *)inbuf;
+	inptr = (char *)inbuf;
 	outptr = (char *)outbuf;
 	inbytesleft = 6;
 	outbytesleft = 6;
diff --git a/tools/test/iconv/posix/posix.c b/tools/test/iconv/posix/posix.c
--- a/tools/test/iconv/posix/posix.c
+++ b/tools/test/iconv/posix/posix.c
@@ -108,7 +108,7 @@
 {
 	iconv_t cd;
 	size_t inbytesleft, outbytesleft;
-	const char *inptr;
+	char *inptr;
 	char *outptr;
 	uint32_t outbuf[4];
 	uint32_t inbuf[2] = { 0x00000151, 0x00000171 };
@@ -116,7 +116,7 @@
 	if ((cd = iconv_open("ASCII", "UTF-32LE")) == (iconv_t)-1)
 		return (1);
 
-	inptr = (const char *)inbuf;
+	inptr = (char *)inbuf;
 	outptr = (char *)outbuf;
 	inbytesleft = 8;
 	outbytesleft = 16;
@@ -129,7 +129,7 @@
 {
 	iconv_t cd;
 	size_t inbytesleft, outbytesleft;
-	const char *inptr;
+	char *inptr;
 	char *outptr;
 	uint32_t inbuf[4];
 	uint32_t outbuf[2];
@@ -138,7 +138,7 @@
 	if ((cd = iconv_open("ASCII", "ASCII")) == (iconv_t)-1)
 		return (1);
 
-	inptr = (const char *)inbuf;
+	inptr = (char *)inbuf;
 	outptr = (char *)outbuf;
 	inbytesleft = 16;
 	outbytesleft = 8;
@@ -168,7 +168,7 @@
 {
 	iconv_t	 cd;
 	size_t inbytesleft, outbytesleft;
-	const char *inptr;
+	char *inptr;
 	char *outptr;
 	uint32_t outbuf[4];
         uint16_t inbuf[1] = { 0xEA42 };
@@ -177,7 +177,7 @@
 	if ((cd = iconv_open("UTF-32", "BIG5")) == (iconv_t)-1)
 		return (1);
 
-	inptr = (const char *)inbuf;
+	inptr = (char *)inbuf;
 	outptr = (char *)outbuf;
 	inbytesleft = 2;
 	outbytesleft = 16;
@@ -207,7 +207,7 @@
 {
 	iconv_t cd;
 	size_t inbytesleft, outbytesleft;
-	const char *inptr;
+	char *inptr;
 	char *outptr;
 	uint32_t outbuf[4];
 	uint16_t inbuf[1] = { 0x8AC0 };
@@ -216,7 +216,7 @@
 	if ((cd = iconv_open("Latin2", "UTF-16LE")) == (iconv_t)-1)
 		return (1);
 
-	inptr = (const char *)inbuf;
+	inptr = (char *)inbuf;
 	outptr = (char *)outbuf;
 	inbytesleft = 4;
 	outbytesleft = 16;
diff --git a/tools/test/iconv/tablegen/tablegen.c b/tools/test/iconv/tablegen/tablegen.c
--- a/tools/test/iconv/tablegen/tablegen.c
+++ b/tools/test/iconv/tablegen/tablegen.c
@@ -287,7 +287,7 @@
 	size_t inbytesleft, outbytesleft, ret;
 	uint32_t outbuf;
 	uint32_t inbuf;
-	const char *inbuf_;
+	char *inbuf_;
 	char *outbuf_;
 
 	for (inbuf = 0; inbuf < (lflag ? 0x100000 : 0x10000); inbuf += 1) {
@@ -297,7 +297,7 @@
 		outbytesleft = 4;
 		outbuf = 0x00000000;
 		outbuf_ = (char *)&outbuf;
-		inbuf_ = (const char *)&inbuf;
+		inbuf_ = (char *)&inbuf;
 		iconv(cd, NULL, NULL, NULL, NULL);
 		fb_flags = 0;
 		errno = 0;