diff --git a/.github/workflows/wasm32.yml b/.github/workflows/wasm32.yml
index 721ded21b861..0d4f32f4c044 100644
--- a/.github/workflows/wasm32.yml
+++ b/.github/workflows/wasm32.yml
@@ -40,7 +40,7 @@ jobs:
           rm wasm32-wasi-libs.tar.gz
 
       - name: Build spec/wasm32_std_spec.cr
-        run: bin/crystal build spec/wasm32_std_spec.cr -o wasm32_std_spec.wasm --target wasm32-wasi -Duse_pcre -Dwithout_openssl
+        run: bin/crystal build spec/wasm32_std_spec.cr -o wasm32_std_spec.wasm --target wasm32-wasi -Dwithout_iconv -Dwithout_openssl
         env:
           CRYSTAL_LIBRARY_PATH: ${{ github.workspace }}/wasm32-wasi-libs
 
diff --git a/spec/spec_helper.cr b/spec/spec_helper.cr
index 98f39b1fc042..a1ee9f49daa1 100644
--- a/spec/spec_helper.cr
+++ b/spec/spec_helper.cr
@@ -8,6 +8,7 @@ require "compiler/requires"
 require "./support/syntax"
 require "./support/tempfile"
 require "./support/win32"
+require "./support/wasm32"
 
 class Crystal::Program
   setter temp_var_counter
diff --git a/spec/std/html_spec.cr b/spec/std/html_spec.cr
index b4f374dca936..2cb5980bd658 100644
--- a/spec/std/html_spec.cr
+++ b/spec/std/html_spec.cr
@@ -1,4 +1,4 @@
-require "spec"
+require "./spec_helper"
 require "html"
 
 describe "HTML" do
@@ -12,7 +12,7 @@ describe "HTML" do
     end
   end
 
-  describe ".unescape" do
+  pending_wasm32 describe: ".unescape" do
     it "identity" do
       HTML.unescape("safe_string").should be("safe_string")
     end
diff --git a/spec/std/path_spec.cr b/spec/std/path_spec.cr
index d1ad7bbf9d81..baa7cffd37b8 100644
--- a/spec/std/path_spec.cr
+++ b/spec/std/path_spec.cr
@@ -931,7 +931,7 @@ describe Path do
     assert_paths_raw("foo..txt/", "foo.", &.stem)
   end
 
-  describe ".home" do
+  pending_wasm32 describe: ".home" do
     it "uses home from environment variable if set" do
       with_env({HOME_ENV_KEY => "foo/bar"}) do
         Path.home.should eq(Path.new("foo/bar"))
diff --git a/spec/std/regex_spec.cr b/spec/std/regex_spec.cr
index 0d600603c3cc..310f94ffc9b4 100644
--- a/spec/std/regex_spec.cr
+++ b/spec/std/regex_spec.cr
@@ -308,7 +308,7 @@ describe "Regex" do
       end
     end
 
-    it "doesn't crash with a large single line string" do
+    pending_wasm32 "doesn't crash with a large single line string" do
       str = File.read(datapath("large_single_line_string.txt"))
 
       {% if Regex::Engine.resolve.name == "Regex::PCRE" %}
diff --git a/spec/std/spec_helper.cr b/spec/std/spec_helper.cr
index 75f8a1fe36d3..7f4b80405826 100644
--- a/spec/std/spec_helper.cr
+++ b/spec/std/spec_helper.cr
@@ -2,6 +2,7 @@ require "spec"
 require "../support/tempfile"
 require "../support/fibers"
 require "../support/win32"
+require "../support/wasm32"
 
 def datapath(*components)
   File.join("spec", "std", "data", *components)
diff --git a/spec/std/string_spec.cr b/spec/std/string_spec.cr
index 178fa81a172c..0d60b3ac2466 100644
--- a/spec/std/string_spec.cr
+++ b/spec/std/string_spec.cr
@@ -2687,14 +2687,12 @@ describe "String" do
       end
     end
 
-    {% unless flag?(:wasm32) %}
-      it "allocates buffer of correct size (#3332)" do
-        String.new(255_u8) do |buffer|
-          LibGC.size(buffer).should be > 255
-          {255, 0}
-        end
+    pending_wasm32 "allocates buffer of correct size (#3332)" do
+      String.new(255_u8) do |buffer|
+        LibGC.size(buffer).should be > 255
+        {255, 0}
       end
-    {% end %}
+    end
 
     it "raises if returned bytesize is greater than capacity" do
       expect_raises ArgumentError, "Bytesize out of capacity bounds" do
diff --git a/spec/support/wasm32.cr b/spec/support/wasm32.cr
new file mode 100644
index 000000000000..98c9de69ea9e
--- /dev/null
+++ b/spec/support/wasm32.cr
@@ -0,0 +1,19 @@
+require "spec"
+
+{% if flag?(:wasm32) %}
+  def pending_wasm32(description = "assert", file = __FILE__, line = __LINE__, end_line = __END_LINE__, &block)
+    pending("#{description} [wasm32]", file, line, end_line)
+  end
+
+  def pending_wasm32(*, describe, file = __FILE__, line = __LINE__, end_line = __END_LINE__, &block)
+    pending_wasm32(describe, file, line, end_line) { }
+  end
+{% else %}
+  def pending_wasm32(description = "assert", file = __FILE__, line = __LINE__, end_line = __END_LINE__, &block)
+    it(description, file, line, end_line, &block)
+  end
+
+  def pending_wasm32(*, describe, file = __FILE__, line = __LINE__, end_line = __END_LINE__, &block)
+    describe(describe, file, line, end_line, &block)
+  end
+{% end %}
diff --git a/spec/wasm32_std_spec.cr b/spec/wasm32_std_spec.cr
index bd1fd39de7a0..7d762e479b91 100644
--- a/spec/wasm32_std_spec.cr
+++ b/spec/wasm32_std_spec.cr
@@ -84,7 +84,7 @@ require "./std/float_printer/ieee_spec.cr"
 require "./std/float_spec.cr"
 require "./std/gc_spec.cr"
 require "./std/hash_spec.cr"
-# require "./std/html_spec.cr" (failed to run)
+require "./std/html_spec.cr"
 # require "./std/http/chunked_content_spec.cr" (failed linking)
 # require "./std/http/client/client_spec.cr" (failed linking)
 # require "./std/http/client/response_spec.cr" (failed linking)
@@ -181,7 +181,7 @@ require "./std/named_tuple_spec.cr"
 # require "./std/openssl/x509/certificate_spec.cr" (failed linking)
 # require "./std/openssl/x509/name_spec.cr" (failed linking)
 require "./std/option_parser_spec.cr"
-# require "./std/path_spec.cr" (failed to run)
+require "./std/path_spec.cr"
 require "./std/pointer_spec.cr"
 require "./std/pp_spec.cr"
 require "./std/pretty_print_spec.cr"
@@ -196,7 +196,7 @@ require "./std/random/secure_spec.cr"
 # require "./std/range_spec.cr" (failed linking)
 require "./std/record_spec.cr"
 # require "./std/reference_spec.cr" (failed to run)
-# require "./std/regex_spec.cr" (failed to run)
+require "./std/regex_spec.cr"
 require "./std/semantic_version_spec.cr"
 require "./std/set_spec.cr"
 require "./std/signal_spec.cr"