diff --git a/tools/bazel/web_test_suite.bzl b/tools/bazel/web_test_suite.bzl
index 1653984219ff..ed37720cf136 100644
--- a/tools/bazel/web_test_suite.bzl
+++ b/tools/bazel/web_test_suite.bzl
@@ -50,13 +50,13 @@ def ng_web_test_suite(deps = [], static_css = [], **kwargs):
             output_to_bindir = True,
             cmd = """
         files=($(execpaths %s))
-        # Escape all double-quotes so that the content can be safely inlined into the
-        # JS template. Note that it needs to be escaped a second time because the string
-        # will be evaluated first in Bash and will then be stored in the JS output.
-        css_content=$$(cat $${files[0]} | sed 's/"/\\\\"/g')
-        js_template='var cssElement = document.createElement("style"); \
+        # Escape backticks, backslashes, and dollar signs so that the content can be safely
+        # inlined into the JS template. Note that it needs to be escaped a second time because
+        # the string will be evaluated first in Bash and will then be stored in the JS output.
+        css_content=$$(cat $${files[0]} | sed -e 's/\\\\/\\\\\\\\/g' -e 's/`/\\\\`/g' -e 's/\\$$/\\\\$$/g')
+        js_template='const cssElement = document.createElement("style"); \
                     cssElement.type = "text/css"; \
-                    cssElement.innerHTML = "'"$$css_content"'"; \
+                    cssElement.innerHTML = `'"$$css_content"'`; \
                     document.head.appendChild(cssElement);'
          echo "$$js_template" > $@
       """ % css_label,