diff --git a/src/writer/glsl/generator_impl.cc b/src/writer/glsl/generator_impl.cc
index f43509e..805fcbb 100644
--- a/src/writer/glsl/generator_impl.cc
+++ b/src/writer/glsl/generator_impl.cc
@@ -563,12 +563,6 @@
     return EmitZeroValue(out, type);
   }
 
-  // For single-value vector initializers, swizzle the scalar to the right
-  // vector dimension using .x
-  const bool is_single_value_vector_init =
-      type->is_scalar_vector() && call->Arguments().size() == 1 &&
-      call->Arguments()[0]->Type()->UnwrapRef()->is_scalar();
-
   auto it = structure_builders_.find(As<sem::Struct>(type));
   if (it != structure_builders_.end()) {
     out << it->second << "(";
@@ -580,10 +574,6 @@
     out << "(";
   }
 
-  if (is_single_value_vector_init) {
-    out << "(";
-  }
-
   bool first = true;
   for (auto* arg : call->Arguments()) {
     if (!first) {
@@ -596,10 +586,6 @@
     }
   }
 
-  if (is_single_value_vector_init) {
-    out << ")." << std::string(type->As<sem::Vector>()->Width(), 'x');
-  }
-
   out << ")";
   return true;
 }
diff --git a/src/writer/glsl/generator_impl_constructor_test.cc b/src/writer/glsl/generator_impl_constructor_test.cc
index f70b5f3..f6f0cd2 100644
--- a/src/writer/glsl/generator_impl_constructor_test.cc
+++ b/src/writer/glsl/generator_impl_constructor_test.cc
@@ -122,7 +122,7 @@
   GeneratorImpl& gen = Build();
 
   ASSERT_TRUE(gen.Generate()) << gen.error();
-  EXPECT_THAT(gen.result(), HasSubstr("vec3((2.0f).xxx)"));
+  EXPECT_THAT(gen.result(), HasSubstr("vec3(2.0f)"));
 }
 
 TEST_F(GlslGeneratorImplTest_Constructor,
@@ -132,7 +132,7 @@
   GeneratorImpl& gen = Build();
 
   ASSERT_TRUE(gen.Generate()) << gen.error();
-  EXPECT_THAT(gen.result(), HasSubstr("bvec3((true).xxx)"));
+  EXPECT_THAT(gen.result(), HasSubstr("bvec3(true)"));
 }
 
 TEST_F(GlslGeneratorImplTest_Constructor,
@@ -142,7 +142,7 @@
   GeneratorImpl& gen = Build();
 
   ASSERT_TRUE(gen.Generate()) << gen.error();
-  EXPECT_THAT(gen.result(), HasSubstr("ivec3((2).xxx)"));
+  EXPECT_THAT(gen.result(), HasSubstr("ivec3(2)"));
 }
 
 TEST_F(GlslGeneratorImplTest_Constructor,
@@ -152,7 +152,7 @@
   GeneratorImpl& gen = Build();
 
   ASSERT_TRUE(gen.Generate()) << gen.error();
-  EXPECT_THAT(gen.result(), HasSubstr("uvec3((2u).xxx)"));
+  EXPECT_THAT(gen.result(), HasSubstr("uvec3(2u)"));
 }
 
 TEST_F(GlslGeneratorImplTest_Constructor, EmitConstructor_Type_Mat) {
diff --git a/test/bug/tint/1121.wgsl.expected.glsl b/test/bug/tint/1121.wgsl.expected.glsl
index 1dad2db..fbdcc64 100644
--- a/test/bug/tint/1121.wgsl.expected.glsl
+++ b/test/bug/tint/1121.wgsl.expected.glsl
@@ -1,5 +1,3 @@
-SKIP: FAILED
-
 #version 310 es
 precision mediump float;
 
@@ -59,8 +57,8 @@
   lightPos = (uniforms.viewMatrix * lightPos);
   lightPos = (lightPos / lightPos.w);
   float lightRadius = lightsBuffer.lights[index].radius;
-  vec4 boxMin = (lightPos - vec4(vec3((lightRadius).xxx), 0.0f));
-  vec4 boxMax = (lightPos + vec4(vec3((lightRadius).xxx), 0.0f));
+  vec4 boxMin = (lightPos - vec4(vec3(lightRadius), 0.0f));
+  vec4 boxMax = (lightPos + vec4(vec3(lightRadius), 0.0f));
   vec4 frustumPlanes[6] = vec4[6](vec4(0.0f, 0.0f, 0.0f, 0.0f), vec4(0.0f, 0.0f, 0.0f, 0.0f), vec4(0.0f, 0.0f, 0.0f, 0.0f), vec4(0.0f, 0.0f, 0.0f, 0.0f), vec4(0.0f, 0.0f, 0.0f, 0.0f), vec4(0.0f, 0.0f, 0.0f, 0.0f));
   frustumPlanes[4] = vec4(0.0f, 0.0f, -1.0f, viewNear);
   frustumPlanes[5] = vec4(0.0f, 0.0f, 1.0f, -(viewFar));
@@ -71,8 +69,8 @@
       {
         for(int x_1 = 0; (x_1 < TILE_COUNT_X); x_1 = (x_1 + 1)) {
           ivec2 tilePixel0Idx = ivec2((x_1 * TILE_SIZE), (y_1 * TILE_SIZE));
-          vec2 floorCoord = (((2.0f * vec2(tilePixel0Idx)) / uniforms.fullScreenSize.xy) - vec2((1.0f).xx));
-          vec2 ceilCoord = (((2.0f * vec2((tilePixel0Idx + ivec2((TILE_SIZE).xx)))) / uniforms.fullScreenSize.xy) - vec2((1.0f).xx));
+          vec2 floorCoord = (((2.0f * vec2(tilePixel0Idx)) / uniforms.fullScreenSize.xy) - vec2(1.0f));
+          vec2 ceilCoord = (((2.0f * vec2((tilePixel0Idx + ivec2(TILE_SIZE)))) / uniforms.fullScreenSize.xy) - vec2(1.0f));
           vec2 viewFloorCoord = vec2((((-(viewNear) * floorCoord.x) - (M[2][0] * viewNear)) / M[0][0]), (((-(viewNear) * floorCoord.y) - (M[2][1] * viewNear)) / M[1][1]));
           vec2 viewCeilCoord = vec2((((-(viewNear) * ceilCoord.x) - (M[2][0] * viewNear)) / M[0][0]), (((-(viewNear) * ceilCoord.y) - (M[2][1] * viewNear)) / M[1][1]));
           frustumPlanes[0] = vec4(1.0f, 0.0f, (-(viewFloorCoord.x) / viewNear), 0.0f);
@@ -135,10 +133,3 @@
 }
 
 
-Error parsing GLSL shader:
-ERROR: 0:60: 'scalar swizzle' : not supported with this profile: es
-ERROR: 0:60: '' : compilation terminated 
-ERROR: 2 compilation errors.  No code generated.
-
-
-
diff --git a/test/bug/tint/980.wgsl.expected.glsl b/test/bug/tint/980.wgsl.expected.glsl
index 84a3101..3f7cc01 100644
--- a/test/bug/tint/980.wgsl.expected.glsl
+++ b/test/bug/tint/980.wgsl.expected.glsl
@@ -1,10 +1,8 @@
-SKIP: FAILED
-
 #version 310 es
 precision mediump float;
 
 vec3 Bad(uint index, vec3 rd) {
-  vec3 normal = vec3((0.0f).xxx);
+  vec3 normal = vec3(0.0f);
   normal[index] = -(sign(rd[index]));
   return normalize(normal);
 }
@@ -34,10 +32,3 @@
 }
 
 
-Error parsing GLSL shader:
-ERROR: 0:5: 'scalar swizzle' : not supported with this profile: es
-ERROR: 0:5: '' : compilation terminated 
-ERROR: 2 compilation errors.  No code generated.
-
-
-
diff --git a/test/bug/tint/992.wgsl.expected.glsl b/test/bug/tint/992.wgsl.expected.glsl
index cf090d0..b9fed97 100644
--- a/test/bug/tint/992.wgsl.expected.glsl
+++ b/test/bug/tint/992.wgsl.expected.glsl
@@ -1,5 +1,3 @@
-SKIP: FAILED
-
 #version 310 es
 precision mediump float;
 
@@ -9,7 +7,7 @@
 
 vec4 frag_main_inner() {
   float b = 0.0f;
-  vec3 v = vec3((b).xxx);
+  vec3 v = vec3(b);
   return vec4(v, 1.0f);
 }
 
@@ -27,10 +25,3 @@
 }
 
 
-Error parsing GLSL shader:
-ERROR: 0:10: 'scalar swizzle' : not supported with this profile: es
-ERROR: 0:10: '' : compilation terminated 
-ERROR: 2 compilation errors.  No code generated.
-
-
-
diff --git a/test/intrinsics/repeated_use.wgsl.expected.glsl b/test/intrinsics/repeated_use.wgsl.expected.glsl
index 51cea44..de8612d 100644
--- a/test/intrinsics/repeated_use.wgsl.expected.glsl
+++ b/test/intrinsics/repeated_use.wgsl.expected.glsl
@@ -31,13 +31,13 @@
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 void tint_symbol() {
   tint_isNormal(vec4(0.0f, 0.0f, 0.0f, 0.0f));
-  tint_isNormal(vec4((1.0f).xxxx));
+  tint_isNormal(vec4(1.0f));
   tint_isNormal(vec4(1.0f, 2.0f, 3.0f, 4.0f));
   tint_isNormal_1(vec3(0.0f, 0.0f, 0.0f));
-  tint_isNormal_1(vec3((1.0f).xxx));
+  tint_isNormal_1(vec3(1.0f));
   tint_isNormal_1(vec3(1.0f, 2.0f, 3.0f));
   tint_isNormal_2(vec2(0.0f, 0.0f));
-  tint_isNormal_2(vec2((1.0f).xx));
+  tint_isNormal_2(vec2(1.0f));
   tint_isNormal_2(vec2(1.0f, 2.0f));
   tint_isNormal_3(1.0f);
   tint_isNormal_3(2.0f);
diff --git a/test/types/function_scope_var_conversions.wgsl.expected.glsl b/test/types/function_scope_var_conversions.wgsl.expected.glsl
index bc199a8..088c30b 100644
--- a/test/types/function_scope_var_conversions.wgsl.expected.glsl
+++ b/test/types/function_scope_var_conversions.wgsl.expected.glsl
@@ -1,5 +1,3 @@
-SKIP: FAILED
-
 #version 310 es
 precision mediump float;
 
@@ -14,17 +12,17 @@
   uint u32_var1 = uint(123);
   uint u32_var2 = uint(123.0f);
   uint u32_var3 = uint(true);
-  bvec3 v3bool_var1 = bvec3(uvec3((123u).xxx));
-  bvec3 v3bool_var11 = bvec3(uvec3((1234u).xxx));
-  bvec3 v3bool_var2 = bvec3(ivec3((123).xxx));
-  bvec3 v3bool_var3 = bvec3(vec3((123.0f).xxx));
-  ivec3 v3i32_var1 = ivec3(uvec3((123u).xxx));
-  ivec3 v3i32_var2 = ivec3(vec3((123.0f).xxx));
-  ivec3 v3i32_var3 = ivec3(bvec3((true).xxx));
-  uvec3 v3u32_var1 = uvec3(ivec3((123).xxx));
-  uvec3 v3u32_var2 = uvec3(vec3((123.0f).xxx));
-  uvec3 v3u32_var3 = uvec3(bvec3((true).xxx));
-  bvec3 v3bool_var4 = bvec3(bvec2(vec2((123.0f).xx)), true);
+  bvec3 v3bool_var1 = bvec3(uvec3(123u));
+  bvec3 v3bool_var11 = bvec3(uvec3(1234u));
+  bvec3 v3bool_var2 = bvec3(ivec3(123));
+  bvec3 v3bool_var3 = bvec3(vec3(123.0f));
+  ivec3 v3i32_var1 = ivec3(uvec3(123u));
+  ivec3 v3i32_var2 = ivec3(vec3(123.0f));
+  ivec3 v3i32_var3 = ivec3(bvec3(true));
+  uvec3 v3u32_var1 = uvec3(ivec3(123));
+  uvec3 v3u32_var2 = uvec3(vec3(123.0f));
+  uvec3 v3u32_var3 = uvec3(bvec3(true));
+  bvec3 v3bool_var4 = bvec3(bvec2(vec2(123.0f)), true);
   bvec4 v4bool_var5 = bvec4(bvec2(vec2(123.0f, 0.0f)), bvec2(true, bool(float(0.0f))));
   return;
 }
@@ -33,10 +31,3 @@
 }
 
 
-Error parsing GLSL shader:
-ERROR: 0:15: 'scalar swizzle' : not supported with this profile: es
-ERROR: 0:15: '' : compilation terminated 
-ERROR: 2 compilation errors.  No code generated.
-
-
-
diff --git a/test/types/module_scope_var_conversions.wgsl.expected.glsl b/test/types/module_scope_var_conversions.wgsl.expected.glsl
index f846718..422c557 100644
--- a/test/types/module_scope_var_conversions.wgsl.expected.glsl
+++ b/test/types/module_scope_var_conversions.wgsl.expected.glsl
@@ -1,5 +1,3 @@
-SKIP: FAILED
-
 #version 310 es
 precision mediump float;
 
@@ -12,16 +10,16 @@
 uint u32_var1 = uint(1);
 uint u32_var2 = uint(1.0f);
 uint u32_var3 = uint(true);
-bvec3 v3bool_var1 = bvec3(uvec3((1u).xxx));
-bvec3 v3bool_var2 = bvec3(ivec3((1).xxx));
-bvec3 v3bool_var3 = bvec3(vec3((1.0f).xxx));
-ivec3 v3i32_var1 = ivec3(uvec3((1u).xxx));
-ivec3 v3i32_var2 = ivec3(vec3((1.0f).xxx));
-ivec3 v3i32_var3 = ivec3(bvec3((true).xxx));
-uvec3 v3u32_var1 = uvec3(ivec3((1).xxx));
-uvec3 v3u32_var2 = uvec3(vec3((1.0f).xxx));
-uvec3 v3u32_var3 = uvec3(bvec3((true).xxx));
-bvec3 v3bool_var4 = bvec3(bvec2(vec2((123.0f).xx)), true);
+bvec3 v3bool_var1 = bvec3(uvec3(1u));
+bvec3 v3bool_var2 = bvec3(ivec3(1));
+bvec3 v3bool_var3 = bvec3(vec3(1.0f));
+ivec3 v3i32_var1 = ivec3(uvec3(1u));
+ivec3 v3i32_var2 = ivec3(vec3(1.0f));
+ivec3 v3i32_var3 = ivec3(bvec3(true));
+uvec3 v3u32_var1 = uvec3(ivec3(1));
+uvec3 v3u32_var2 = uvec3(vec3(1.0f));
+uvec3 v3u32_var3 = uvec3(bvec3(true));
+bvec3 v3bool_var4 = bvec3(bvec2(vec2(123.0f)), true);
 bvec4 v4bool_var5 = bvec4(bvec2(vec2(123.0f, 0.0f)), bvec2(true, bool(float(0.0f))));
 
 layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
@@ -53,10 +51,3 @@
 }
 
 
-Error parsing GLSL shader:
-ERROR: 0:13: 'scalar swizzle' : not supported with this profile: es
-ERROR: 0:13: '' : compilation terminated 
-ERROR: 2 compilation errors.  No code generated.
-
-
-