diff --git a/math/dec_internal_test.go b/math/dec_internal_test.go
index 248bd4bc45..0680cf0094 100644
--- a/math/dec_internal_test.go
+++ b/math/dec_internal_test.go
@@ -17,9 +17,35 @@ func TestDecimalInternalTestSuite(t *testing.T) {
 }
 
 func (s *decimalInternalTestSuite) TestPrecisionMultiplier() {
-	res := precisionMultiplier(5)
-	exp := big.NewInt(10000000000000)
-	s.Require().Equal(0, res.Cmp(exp), "equality was incorrect, res %v, exp %v", res, exp)
+	tests := []struct {
+		prec int64
+		exp  *big.Int
+	}{
+		{
+			5,
+			big.NewInt(10000000000000),
+		},
+		{
+			8,
+			big.NewInt(10000000000),
+		},
+		{
+			11,
+			big.NewInt(10000000),
+		},
+		{
+			15,
+			big.NewInt(1000),
+		},
+		{
+			18,
+			big.NewInt(1),
+		},
+	}
+	for _, tt := range tests {
+		res := precisionMultiplier(tt.prec)
+		s.Require().Equal(0, res.Cmp(tt.exp), "equality was incorrect, res %v, exp %v", res, tt.exp)
+	}
 }
 
 func (s *decimalInternalTestSuite) TestZeroDeserializationJSON() {