diff --git a/src/interfaces/ecpg/test/compat_informix/dec_test.pgc b/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
index 8f6f109dcf..8e333206b5 100644
--- a/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
+++ b/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
@@ -38,7 +38,7 @@ main(void)
 	long l;
 	int i, j, k, q, r, count = 0;
 	double dbl;
-	decimal **decarr = (decimal **) malloc(1);
+	decimal **decarr = (decimal **) calloc(1, sizeof(decimal));
 
 	ECPGdebug(1, stderr);
 
@@ -71,7 +71,7 @@ main(void)
 
 		din = PGTYPESdecimal_new();
 		r = dectoasc(din, buf, BUFSIZE-1, 2);
-		if (!r < 0) check_errno();
+		if (r < 0) check_errno();
 		printf("dec[%d,5]: r: %d, %s\n", i, r, buf);
 
 		r = dectolong(dec, &l);
diff --git a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
index fd5d5c7868..f9f0bf3ab1 100644
--- a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
+++ b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
@@ -58,7 +58,7 @@ main(void)
 	long l;
 	int i, j, k, q, r, count = 0;
 	double dbl;
-	decimal **decarr = (decimal **) malloc(1);
+	decimal **decarr = (decimal **) calloc(1, sizeof(decimal));
 
 	ECPGdebug(1, stderr);
 
@@ -91,7 +91,7 @@ main(void)
 
 		din = PGTYPESdecimal_new();
 		r = dectoasc(din, buf, BUFSIZE-1, 2);
-		if (!r < 0) check_errno();
+		if (r < 0) check_errno();
 		printf("dec[%d,5]: r: %d, %s\n", i, r, buf);
 
 		r = dectolong(dec, &l);
diff --git a/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c b/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c
index 6fa54a4c25..3e20f10b1a 100644
--- a/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c
+++ b/src/interfaces/ecpg/test/expected/pgtypeslib-num_test2.c
@@ -48,7 +48,7 @@ main(void)
 	long l;
 	int i, j, k, q, r, count = 0;
 	double d;
-	numeric **numarr = (numeric **) malloc(1);
+	numeric **numarr = (numeric **) calloc(1, sizeof(numeric));
 
 	ECPGdebug(1, stderr);
 
diff --git a/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc b/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc
index 19329cedb2..c4bbe74441 100644
--- a/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc
+++ b/src/interfaces/ecpg/test/pgtypeslib/num_test2.pgc
@@ -30,7 +30,7 @@ main(void)
 	long l;
 	int i, j, k, q, r, count = 0;
 	double d;
-	numeric **numarr = (numeric **) malloc(1);
+	numeric **numarr = (numeric **) calloc(1, sizeof(numeric));
 
 	ECPGdebug(1, stderr);