diff --git a/packages/react-native/Libraries/StyleSheet/__tests__/processFilter-test.js b/packages/react-native/Libraries/StyleSheet/__tests__/processFilter-test.js
index af0cbf0bf06..5612da4a35d 100644
--- a/packages/react-native/Libraries/StyleSheet/__tests__/processFilter-test.js
+++ b/packages/react-native/Libraries/StyleSheet/__tests__/processFilter-test.js
@@ -112,7 +112,7 @@ describe('processFilter', () => {
   });
   it('string multiple filters', () => {
     expect(
-      processFilter('brightness(0.5) opacity(0.5) blur(5) hue-rotate(90deg)'),
+      processFilter('brightness(0.5) opacity(0.5) blur(5px) hue-rotate(90deg)'),
     ).toEqual([{brightness: 0.5}, {opacity: 0.5}, {blur: 5}, {hueRotate: 90}]);
   });
   it('string multiple filters with newlines', () => {
@@ -124,7 +124,7 @@ describe('processFilter', () => {
   });
   it('string multiple filters one invalid', () => {
     expect(
-      processFilter('brightness(0.5) opacity(0.5) blur(5) hue-rotate(90foo)'),
+      processFilter('brightness(0.5) opacity(0.5) blur(5px) hue-rotate(90foo)'),
     ).toEqual([]);
   });
   it('string multiple same filters', () => {
@@ -233,7 +233,7 @@ function createFilterPrimitive(
 
 function testDropShadow() {
   it('should parse string drop-shadow', () => {
-    expect(processFilter('drop-shadow(4px 4 10px red)')).toEqual([
+    expect(processFilter('drop-shadow(4px 4px 10px red)')).toEqual([
       {
         dropShadow: {
           offsetX: 4,
@@ -246,7 +246,7 @@ function testDropShadow() {
   });
 
   it('should parse string negative offsets drop-shadow', () => {
-    expect(processFilter('drop-shadow(-4 -4)')).toEqual([
+    expect(processFilter('drop-shadow(-4px -4px)')).toEqual([
       {
         dropShadow: {
           offsetX: -4,
@@ -258,7 +258,9 @@ function testDropShadow() {
 
   it('should parse string multiple drop-shadows', () => {
     expect(
-      processFilter('drop-shadow(4 4) drop-shadow(4 4) drop-shadow(4 4)'),
+      processFilter(
+        'drop-shadow(4px 4px) drop-shadow(4px 4px) drop-shadow(4px 4px)',
+      ),
     ).toEqual([
       {
         dropShadow: {
@@ -283,7 +285,7 @@ function testDropShadow() {
 
   it('should parse string drop-shadow with random whitespaces', () => {
     expect(
-      processFilter('    drop-shadow(4px  4   10px        red)    '),
+      processFilter('    drop-shadow(4px  4px   10px        red)    '),
     ).toEqual([
       {
         dropShadow: {
@@ -299,7 +301,7 @@ function testDropShadow() {
   it('should parse string drop-shadow with multiple filters', () => {
     expect(
       processFilter(
-        'drop-shadow(4px 4 10px red) brightness(0.5) brightness(0.5)',
+        'drop-shadow(4px 4px 10px red) brightness(0.5) brightness(0.5)',
       ),
     ).toEqual([
       {
@@ -316,7 +318,7 @@ function testDropShadow() {
   });
 
   it('should parse string drop-shadow with color', () => {
-    expect(processFilter('drop-shadow(50 50 purple)')).toEqual([
+    expect(processFilter('drop-shadow(50px 50px purple)')).toEqual([
       {
         dropShadow: {
           offsetX: 50,
@@ -328,7 +330,7 @@ function testDropShadow() {
   });
 
   it('should parse string drop-shadow with rgba color', () => {
-    expect(processFilter('drop-shadow(50 50 rgba(0, 0, 0, 1))')).toEqual([
+    expect(processFilter('drop-shadow(50px 50px rgba(0, 0, 0, 1))')).toEqual([
       {
         dropShadow: {
           offsetX: 50,
@@ -340,7 +342,7 @@ function testDropShadow() {
   });
 
   it('should parse string with mixed case drop-shadow', () => {
-    expect(processFilter('DroP-sHaDOw(50 50 purple)')).toEqual([
+    expect(processFilter('DroP-sHaDOw(50px 50px purple)')).toEqual([
       {
         dropShadow: {
           offsetX: 50,
@@ -359,7 +361,7 @@ function testDropShadow() {
             offsetX: 4,
             offsetY: 4,
             color: '#FFFFFF',
-            standardDeviation: '10',
+            standardDeviation: '10px',
           },
         },
       ]),
@@ -376,7 +378,7 @@ function testDropShadow() {
   });
 
   it('should fail to parse string comma separated drop-shadow', () => {
-    expect(processFilter('drop-shadow(4px, 4, 10px, red)')).toEqual([]);
+    expect(processFilter('drop-shadow(4px, 4px, 10px, red)')).toEqual([]);
   });
 
   it('should fail to parse other symbols after args comma separated drop-shadow', () => {
@@ -384,15 +386,15 @@ function testDropShadow() {
   });
 
   it('should fail on color between lengths string drop-shadow', () => {
-    expect(processFilter('drop-shadow(10 red 10 10')).toEqual([]);
+    expect(processFilter('drop-shadow(10px red 10px 10px')).toEqual([]);
   });
 
   it('should fail on color between offset & blur string drop-shadow', () => {
-    expect(processFilter('drop-shadow(10 10 red  10')).toEqual([]);
+    expect(processFilter('drop-shadow(10px 10px red  10px')).toEqual([]);
   });
 
   it('should fail on negative blue', () => {
-    expect(processFilter('drop-shadow(10 10 -10')).toEqual([]);
+    expect(processFilter('drop-shadow(10px 10px -10px')).toEqual([]);
   });
 
   it('should fail on invalid object drop-shadow', () => {
diff --git a/packages/react-native/Libraries/StyleSheet/processFilter.js b/packages/react-native/Libraries/StyleSheet/processFilter.js
index f91ddc0994a..8f77d16432d 100644
--- a/packages/react-native/Libraries/StyleSheet/processFilter.js
+++ b/packages/react-native/Libraries/StyleSheet/processFilter.js
@@ -317,5 +317,9 @@ function parseLength(length: string): ?number {
     return null;
   }
 
+  if (match[3] == null && match[1] !== '0') {
+    return null;
+  }
+
   return Number(match[1]);
 }