diff --git a/src/interfaces/ecpg/test/compat_informix/dec_test.pgc b/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
index c79b2876e2..37b9a40b3a 100644
--- a/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
+++ b/src/interfaces/ecpg/test/compat_informix/dec_test.pgc
@@ -100,7 +100,7 @@ main(void)
 
 		r = dectodbl(dec, &dbl);
 		if (r) check_errno();
-		printf("dec[%d,10]: %2.7f (r: %d)\n", i, r?0.0:dbl, r);
+		printf("dec[%d,10]: %g (r: %d)\n", i, r?0.0:dbl, r);
 
 		PGTYPESdecimal_free(din);
 		printf("\n");
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 408059e726..cb51daaf0b 100644
--- a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
+++ b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.c
@@ -120,7 +120,7 @@ main(void)
 
 		r = dectodbl(dec, &dbl);
 		if (r) check_errno();
-		printf("dec[%d,10]: %2.7f (r: %d)\n", i, r?0.0:dbl, r);
+		printf("dec[%d,10]: %g (r: %d)\n", i, r?0.0:dbl, r);
 
 		PGTYPESdecimal_free(din);
 		printf("\n");
diff --git a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout
index bbd45c6070..1b52378538 100644
--- a/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout
+++ b/src/interfaces/ecpg/test/expected/compat_informix-dec_test.stdout
@@ -5,7 +5,7 @@
 dec[0,5]: r: 0, 0.00
 (errno == PGTYPES_NUM_OVERFLOW) - dec[0,6]: 0 (r: -1)
 (errno == PGTYPES_NUM_OVERFLOW) - dec[0,8]: 0 (r: -1)
-(errno == PGTYPES_NUM_OVERFLOW) - dec[0,10]: 0.0000000 (r: -1)
+(errno == PGTYPES_NUM_OVERFLOW) - dec[0,10]: 0 (r: -1)
 
 dec[1,1]: r: 0, -2
 dec[1,2]: r: 0, -2
@@ -16,7 +16,7 @@ dec[1,6]: -2 (r: 0)
 dec[1,7]: -2.00 (r: 0 - cmp: 0)
 dec[1,8]: -2 (r: 0)
 dec[1,9]: -2.00 (r: 0 - cmp: 0)
-dec[1,10]: -2.0000000 (r: 0)
+dec[1,10]: -2 (r: 0)
 
 dec[2,1]: r: 0, 0.794
 dec[2,2]: r: 0, 1
@@ -27,7 +27,7 @@ dec[2,6]: 1 (r: 0)
 dec[2,7]: 1.00 (r: 0 - cmp: -1)
 dec[2,8]: 1 (r: 0)
 dec[2,9]: 1.00 (r: 0 - cmp: -1)
-dec[2,10]: 0.7940000 (r: 0)
+dec[2,10]: 0.794 (r: 0)
 
 dec[3,1]: r: 0, 3.44
 dec[3,2]: r: 0, 3
@@ -38,7 +38,7 @@ dec[3,6]: 3 (r: 0)
 dec[3,7]: 3.00 (r: 0 - cmp: 1)
 dec[3,8]: 3 (r: 0)
 dec[3,9]: 3.00 (r: 0 - cmp: 1)
-dec[3,10]: 3.4400000 (r: 0)
+dec[3,10]: 3.44 (r: 0)
 
 dec[4,1]: r: 0, 592490000000000000000000
 dec[4,2]: r: 0, 592490000000000000000000
@@ -47,7 +47,7 @@ dec[4,4]: r: 0, 592490000000000000000000.00
 dec[4,5]: r: 0, 0.00
 (errno == PGTYPES_NUM_OVERFLOW) - dec[4,6]: 0 (r: -1)
 (errno == PGTYPES_NUM_OVERFLOW) - dec[4,8]: 0 (r: -1)
-dec[4,10]: 592490000000000009961472.0000000 (r: 0)
+dec[4,10]: 5.9249e+23 (r: 0)
 
 dec[5,1]: r: 0, -328400
 dec[5,2]: r: 0, -328400
@@ -58,7 +58,7 @@ dec[5,6]: -328400 (r: 0)
 dec[5,7]: -328400.00 (r: 0 - cmp: 0)
 dec[5,8]: -328400 (r: 0)
 dec[5,9]: -328400.00 (r: 0 - cmp: 0)
-dec[5,10]: -328400.0000000 (r: 0)
+dec[5,10]: -328400 (r: 0)
 
 (no errno set) - dec[6,1]: r: -1, *
 dec[6,2]: r: 0, 0
@@ -69,7 +69,7 @@ dec[6,6]: 0 (r: 0)
 dec[6,7]: 0.00 (r: 0 - cmp: 1)
 dec[6,8]: 0 (r: 0)
 dec[6,9]: 0.00 (r: 0 - cmp: 1)
-(errno == PGTYPES_NUM_UNDERFLOW) - dec[6,10]: 0.0000000 (r: -1)
+(errno == PGTYPES_NUM_UNDERFLOW) - dec[6,10]: 0 (r: -1)
 
 dec[7,1]: r: 0, 0.001
 dec[7,2]: r: 0, 0
@@ -80,7 +80,7 @@ dec[7,6]: 0 (r: 0)
 dec[7,7]: 0.00 (r: 0 - cmp: 1)
 dec[7,8]: 0 (r: 0)
 dec[7,9]: 0.00 (r: 0 - cmp: 1)
-dec[7,10]: 0.0010000 (r: 0)
+dec[7,10]: 0.001 (r: 0)
 
 dec[8,1]: r: 0, 0.0
 dec[8,2]: r: 0, 0
@@ -91,7 +91,7 @@ dec[8,6]: 0 (r: 0)
 dec[8,7]: 0.00 (r: 0 - cmp: 0)
 dec[8,8]: 0 (r: 0)
 dec[8,9]: 0.00 (r: 0 - cmp: 0)
-dec[8,10]: 0.0000000 (r: 0)
+dec[8,10]: 0 (r: 0)
 
 dec[9,1]: r: 0, -0.000059249
 dec[9,2]: r: 0, -0
@@ -102,7 +102,7 @@ dec[9,6]: 0 (r: 0)
 dec[9,7]: 0.00 (r: 0 - cmp: -1)
 dec[9,8]: 0 (r: 0)
 dec[9,9]: 0.00 (r: 0 - cmp: -1)
-dec[9,10]: -0.0000592 (r: 0)
+dec[9,10]: -5.9249e-05 (r: 0)
 
 dec[10,1]: r: 0, 0.003284
 dec[10,2]: r: 0, 0
@@ -113,7 +113,7 @@ dec[10,6]: 0 (r: 0)
 dec[10,7]: 0.00 (r: 0 - cmp: 1)
 dec[10,8]: 0 (r: 0)
 dec[10,9]: 0.00 (r: 0 - cmp: 1)
-dec[10,10]: 0.0032840 (r: 0)
+dec[10,10]: 0.003284 (r: 0)
 
 dec[11,1]: r: 0, 0.500001
 dec[11,2]: r: 0, 1
@@ -124,7 +124,7 @@ dec[11,6]: 1 (r: 0)
 dec[11,7]: 1.00 (r: 0 - cmp: -1)
 dec[11,8]: 1 (r: 0)
 dec[11,9]: 1.00 (r: 0 - cmp: -1)
-dec[11,10]: 0.5000010 (r: 0)
+dec[11,10]: 0.500001 (r: 0)
 
 dec[12,1]: r: 0, -0.5000001
 dec[12,2]: r: 0, -1
@@ -135,7 +135,7 @@ dec[12,6]: -1 (r: 0)
 dec[12,7]: -1.00 (r: 0 - cmp: 1)
 dec[12,8]: -1 (r: 0)
 dec[12,9]: -1.00 (r: 0 - cmp: 1)
-dec[12,10]: -0.5000001 (r: 0)
+dec[12,10]: -0.5 (r: 0)
 
 dec[13,1]: r: 0, 1234567890123456789012345678.91
 dec[13,2]: r: 0, 1234567890123456789012345679
@@ -144,7 +144,7 @@ dec[13,4]: r: 0, 1234567890123456789012345678.91
 dec[13,5]: r: 0, 0.00
 (errno == PGTYPES_NUM_OVERFLOW) - dec[13,6]: 0 (r: -1)
 (errno == PGTYPES_NUM_OVERFLOW) - dec[13,8]: 0 (r: -1)
-dec[13,10]: 1234567890123456850245451776.0000000 (r: 0)
+dec[13,10]: 1.23457e+27 (r: 0)
 
 (errno == PGTYPES_NUM_OVERFLOW) - dec[14,0]: r: -1200
 (errno == PGTYPES_NUM_BAD_NUMERIC) - dec[15,0]: r: -1213