diff --git a/plugin-packs/postcss-preset-env/test/basic.preserve.false.expect.css b/plugin-packs/postcss-preset-env/test/basic.preserve.false.expect.css
index 10398cb39..c357ff53f 100644
--- a/plugin-packs/postcss-preset-env/test/basic.preserve.false.expect.css
+++ b/plugin-packs/postcss-preset-env/test/basic.preserve.false.expect.css
@@ -21,7 +21,7 @@
 	        order: 2;
 }
 
-@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (-o-min-device-pixel-ratio: 2/1), (min-resolution: 192dpi) {
+@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (min-resolution: 192dpi) {
 
 .test-image-set-function {
 	background-image: url(img/test-2x.png);
@@ -295,18 +295,15 @@ h1.test-custom-selectors:not(.does-not-exist), h2.test-custom-selectors:not(.doe
 	-webkit-transform: none;
 	   -moz-transform: none;
 	    -ms-transform: none;
-	     -o-transform: none;
 	        transform: none;
 	-webkit-transform-origin: 50% 50% 0;
 	   -moz-transform-origin: 50% 50% 0;
 	    -ms-transform-origin: 50% 50% 0;
-	     -o-transform-origin: 50% 50% 0;
 	        transform-origin: 50% 50% 0;
 	-webkit-transform-style: flat;
 	   -moz-transform-style: flat;
 	        transform-style: flat;
 	-webkit-transition: none 0s ease 0s;
-	-o-transition: none 0s ease 0s;
 	-moz-transition: none 0s ease 0s;
 	transition: none 0s ease 0s;
 	unicode-bidi: normal;
@@ -602,7 +599,6 @@ h1.test-custom-selectors:not(.does-not-exist), h2.test-custom-selectors:not(.doe
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 	width: 2px;
 }
@@ -614,7 +610,6 @@ h1.test-custom-selectors:not(.does-not-exist), h2.test-custom-selectors:not(.doe
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 }
 
diff --git a/plugin-packs/postcss-preset-env/test/basic.preserve.true.expect.css b/plugin-packs/postcss-preset-env/test/basic.preserve.true.expect.css
index cb6988b03..3a1b1abf4 100644
--- a/plugin-packs/postcss-preset-env/test/basic.preserve.true.expect.css
+++ b/plugin-packs/postcss-preset-env/test/basic.preserve.true.expect.css
@@ -33,7 +33,7 @@
 	        order: 2;
 }
 
-@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (-o-min-device-pixel-ratio: 2/1), (min-resolution: 192dpi) {
+@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (min-resolution: 192dpi) {
 
 .test-image-set-function {
 	background-image: url(img/test-2x.png);
@@ -359,18 +359,15 @@ h1.test-custom-selectors:not(.does-not-exist), h2.test-custom-selectors:not(.doe
 	-webkit-transform: none;
 	   -moz-transform: none;
 	    -ms-transform: none;
-	     -o-transform: none;
 	        transform: none;
 	-webkit-transform-origin: 50% 50% 0;
 	   -moz-transform-origin: 50% 50% 0;
 	    -ms-transform-origin: 50% 50% 0;
-	     -o-transform-origin: 50% 50% 0;
 	        transform-origin: 50% 50% 0;
 	-webkit-transform-style: flat;
 	   -moz-transform-style: flat;
 	        transform-style: flat;
 	-webkit-transition: none 0s ease 0s;
-	-o-transition: none 0s ease 0s;
 	-moz-transition: none 0s ease 0s;
 	transition: none 0s ease 0s;
 	unicode-bidi: normal;
@@ -801,12 +798,10 @@ h1.test-custom-selectors:not(.does-not-exist), h2.test-custom-selectors:not(.doe
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 	-webkit-transform: rotate(mod(-140deg, -90deg));
 	   -moz-transform: rotate(mod(-140deg, -90deg));
 	    -ms-transform: rotate(mod(-140deg, -90deg));
-	     -o-transform: rotate(mod(-140deg, -90deg));
 	        transform: rotate(mod(-140deg, -90deg));
 	width: 2px;
 	width: mod(mod(-18px, 5px), 5px);
@@ -822,12 +817,10 @@ h1.test-custom-selectors:not(.does-not-exist), h2.test-custom-selectors:not(.doe
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 	-webkit-transform: rotate(rem(-140deg, -90deg));
 	   -moz-transform: rotate(rem(-140deg, -90deg));
 	    -ms-transform: rotate(rem(-140deg, -90deg));
-	     -o-transform: rotate(rem(-140deg, -90deg));
 	        transform: rotate(rem(-140deg, -90deg));
 }
 
diff --git a/plugin-packs/postcss-preset-env/test/layers-basic.expect.css b/plugin-packs/postcss-preset-env/test/layers-basic.expect.css
index 8c66979d9..439a7967d 100644
--- a/plugin-packs/postcss-preset-env/test/layers-basic.expect.css
+++ b/plugin-packs/postcss-preset-env/test/layers-basic.expect.css
@@ -41,7 +41,7 @@
 		        order: 2;
 	}
 
-@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (-o-min-device-pixel-ratio: 2/1), (min-resolution: 192dpi) {
+@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (min-resolution: 192dpi) {
 
 	.test-image-set-function:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#) {
 		background-image: url(img/test-2x.png);
@@ -306,18 +306,15 @@ h1.test-custom-selectors:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):n
 	-webkit-transform: none;
 	   -moz-transform: none;
 	    -ms-transform: none;
-	     -o-transform: none;
 	        transform: none;
 	-webkit-transform-origin: 50% 50% 0;
 	   -moz-transform-origin: 50% 50% 0;
 	    -ms-transform-origin: 50% 50% 0;
-	     -o-transform-origin: 50% 50% 0;
 	        transform-origin: 50% 50% 0;
 	-webkit-transform-style: flat;
 	   -moz-transform-style: flat;
 	        transform-style: flat;
 	-webkit-transition: none 0s ease 0s;
-	-o-transition: none 0s ease 0s;
 	-moz-transition: none 0s ease 0s;
 	transition: none 0s ease 0s;
 	unicode-bidi: normal;
@@ -648,7 +645,6 @@ h1.test-custom-selectors:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):n
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 	width: 2px;
 }
@@ -660,7 +656,6 @@ h1.test-custom-selectors:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):n
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 }
 
diff --git a/plugin-packs/postcss-preset-env/test/layers-basic.preserve.true.expect.css b/plugin-packs/postcss-preset-env/test/layers-basic.preserve.true.expect.css
index 22b71a640..cacddd0b2 100644
--- a/plugin-packs/postcss-preset-env/test/layers-basic.preserve.true.expect.css
+++ b/plugin-packs/postcss-preset-env/test/layers-basic.preserve.true.expect.css
@@ -50,7 +50,7 @@
 		        order: 2;
 	}
 
-@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (-o-min-device-pixel-ratio: 2/1), (min-resolution: 192dpi){
+@media (-webkit-min-device-pixel-ratio: 2), (min--moz-device-pixel-ratio: 2), (min-resolution: 192dpi){
 
 	.test-image-set-function:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#) {
 		background-image: url(img/test-2x.png);
@@ -362,18 +362,15 @@ h1.test-custom-selectors:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):n
 	-webkit-transform: none;
 	   -moz-transform: none;
 	    -ms-transform: none;
-	     -o-transform: none;
 	        transform: none;
 	-webkit-transform-origin: 50% 50% 0;
 	   -moz-transform-origin: 50% 50% 0;
 	    -ms-transform-origin: 50% 50% 0;
-	     -o-transform-origin: 50% 50% 0;
 	        transform-origin: 50% 50% 0;
 	-webkit-transform-style: flat;
 	   -moz-transform-style: flat;
 	        transform-style: flat;
 	-webkit-transition: none 0s ease 0s;
-	-o-transition: none 0s ease 0s;
 	-moz-transition: none 0s ease 0s;
 	transition: none 0s ease 0s;
 	unicode-bidi: normal;
@@ -801,12 +798,10 @@ h1.test-custom-selectors:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):n
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 	-webkit-transform: rotate(mod(-140deg, -90deg));
 	   -moz-transform: rotate(mod(-140deg, -90deg));
 	    -ms-transform: rotate(mod(-140deg, -90deg));
-	     -o-transform: rotate(mod(-140deg, -90deg));
 	        transform: rotate(mod(-140deg, -90deg));
 	width: 2px;
 	width: mod(mod(-18px, 5px), 5px);
@@ -822,12 +817,10 @@ h1.test-custom-selectors:not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):not(#\#):n
 	-webkit-transform: rotate(-50deg);
 	   -moz-transform: rotate(-50deg);
 	    -ms-transform: rotate(-50deg);
-	     -o-transform: rotate(-50deg);
 	        transform: rotate(-50deg);
 	-webkit-transform: rotate(rem(-140deg, -90deg));
 	   -moz-transform: rotate(rem(-140deg, -90deg));
 	    -ms-transform: rotate(rem(-140deg, -90deg));
-	     -o-transform: rotate(rem(-140deg, -90deg));
 	        transform: rotate(rem(-140deg, -90deg));
 }