diff --git a/lib/formatting.js b/lib/formatting.js
index de7e637b..9bd96112 100644
--- a/lib/formatting.js
+++ b/lib/formatting.js
@@ -839,7 +839,7 @@ const $as = {
      *   - `obj` - the formatting object, and is the same as `this` context
      *
      * - For $[Index Variables] formatting:
-     *   - `index` - element's index (starts with 1) that's outside of the input array
+     *   - `index` - element's index (starts with 1) that's outside the input array
      *   - `arr` - the formatting/input array, and is the same as `this` context
      *
      *   You can tell which type of call it is by checking the type of the first parameter.
@@ -884,7 +884,8 @@ const $to = {
     },
     number(num) {
         if (typeof num === 'bigint' || Number.isFinite(num)) {
-            return num.toString();
+            const s = num.toString();
+            return num < 0 ? `(${s})` : s;
         }
         // Converting NaN/+Infinity/-Infinity according to Postgres documentation:
         // http://www.postgresql.org/docs/9.6/static/datatype-numeric.html#DATATYPE-FLOAT
diff --git a/test/db.spec.js b/test/db.spec.js
index 918933b5..369758ca 100644
--- a/test/db.spec.js
+++ b/test/db.spec.js
@@ -239,9 +239,6 @@ describe('Connection', () => {
     });
 
     if (!isWindows) {
-        /*
-          Disabled this test on 14/11/2020, since it started showing crypto-related issues on Windows;
-        */
         describe('for invalid connection', () => {
             const dbErr = pgp('bla-bla');
             let error;
@@ -268,9 +265,6 @@ describe('Connection', () => {
     }
 
     if (!isWindows) {
-        /*
-          Disabled this test on 14/11/2020, since it started showing crypto-related issues on Windows;
-        */
         describe('for invalid user name', () => {
             const errCN = JSON.parse(JSON.stringify(dbHeader.cn)); // dumb connection cloning;
             errCN.user = 'somebody';
@@ -354,10 +348,6 @@ describe('Connection', () => {
     });
 
     if (!isWindows) {
-        /*
-        This test has been known to be very flaky, especially on Windows, and keeps
-        getting in the way of testing the framework locally.
-        */
         describe('db side closing of the connection pool', () => {
             const singleCN = JSON.parse(JSON.stringify(dbHeader.cn)); // dumb connection cloning;
             singleCN.max = 1;
diff --git a/test/format.spec.js b/test/format.spec.js
index f7f5e66f..3b3290aa 100644
--- a/test/format.spec.js
+++ b/test/format.spec.js
@@ -122,7 +122,7 @@ describe('Method as.number', () => {
         expect(pgp.as.number(0)).toBe('0');
         expect(pgp.as.number(1)).toBe('1');
         expect(pgp.as.number(1234567890)).toBe('1234567890');
-        expect(pgp.as.number(-123.456)).toBe('-123.456');
+        expect(pgp.as.number(-123.456)).toBe('(-123.456)');
         expect(pgp.as.number(NaN)).toBe('\'NaN\'');
         expect(pgp.as.number(Number.NaN)).toBe('\'NaN\'');
         expect(pgp.as.number(1 / 0)).toBe('\'+Infinity\'');
@@ -326,8 +326,8 @@ describe('Method as.csv', () => {
 
         expect(pgp.as.csv(0)).toBe('0'); // test zero;
         expect(pgp.as.csv([0])).toBe('0'); // test zero in array;
-        expect(pgp.as.csv(-123.456)).toBe('-123.456'); // test a float;
-        expect(pgp.as.csv([-123.456])).toBe('-123.456'); // test a float in array;
+        expect(pgp.as.csv(-123.456)).toBe('(-123.456)'); // test a float;
+        expect(pgp.as.csv([-123.456])).toBe('(-123.456)'); // test a float in array;
 
         expect(pgp.as.csv(true)).toBe('true'); // test boolean True;
         expect(pgp.as.csv([true])).toBe('true'); // test boolean True in array;
@@ -678,7 +678,7 @@ describe('Method as.format', () => {
         expect(pgp.as.format('$1', [userObj])).toBe(pgp.as.text(JSON.stringify(userObj)));
         expect(pgp.as.format('$1^', [userObj])).toBe(JSON.stringify(userObj));
 
-        expect(pgp.as.format('$1, $2, $3, $4', [true, -12.34, 'text', dateSample])).toBe(`true, -12.34, 'text', '${$pgUtils.prepareValue(dateSample)}'`);
+        expect(pgp.as.format('$1, $2, $3, $4', [true, -12.34, 'text', dateSample])).toBe(`true, (-12.34), 'text', '${$pgUtils.prepareValue(dateSample)}'`);
 
         expect(pgp.as.format('$1 $1, $2 $2, $1', [1, 'two'])).toBe('1 1, \'two\' \'two\', 1'); // test for repeated variables;
 
@@ -970,7 +970,7 @@ describe('Named Parameters', () => {
             three: -123.45,
             four: dateSample,
             five: () => 'text'
-        })).toBe('null,true,-123.45,\'' + $pgUtils.prepareValue(dateSample) + '\',\'text\'');
+        })).toBe('null,true,(-123.45),\'' + $pgUtils.prepareValue(dateSample) + '\',\'text\'');
     });
 
     it('must treat null and undefined values equally', () => {