diff --git a/src/api/views.py b/src/api/views.py
index 2cb23a9b2..a9f8d7692 100644
--- a/src/api/views.py
+++ b/src/api/views.py
@@ -2,6 +2,9 @@
 from django.apps import apps
 from django.views.decorators.http import require_http_methods
 from django.http import JsonResponse
+from django.utils.safestring import mark_safe
+
+from registrar.templatetags.url_helpers import public_site_url
 
 import requests
 
@@ -18,8 +21,13 @@ DOMAIN_API_MESSAGES = {
     " For example, if you want www.city.gov, you would enter “city”"
     " (without the quotes).",
     "extra_dots": "Enter the .gov domain you want without any periods.",
-    "unavailable": "That domain isn’t available. Try entering another one."
-    " Contact us if you need help coming up with a domain.",
+    # message below is considered safe; no user input can be inserted into the message
+    # body; public_site_url() function reads from local app settings and therefore safe
+    "unavailable": mark_safe(  # nosec
+        "That domain isn’t available. "
+        "<a class='usa-link' href='{}' target='_blank'>"
+        "Read more about choosing your .gov domain.</a>".format(public_site_url("domains/choosing"))
+    ),
     "invalid": "Enter a domain using only letters, numbers, or hyphens (though we don't recommend using hyphens).",
     "success": "That domain is available!",
     "error": "Error finding domain availability.",
diff --git a/src/registrar/assets/js/get-gov.js b/src/registrar/assets/js/get-gov.js
index b659b117e..d069e8dc4 100644
--- a/src/registrar/assets/js/get-gov.js
+++ b/src/registrar/assets/js/get-gov.js
@@ -115,14 +115,14 @@ function inlineToast(el, id, style, msg) {
       toast.className = `usa-alert usa-alert--${style} usa-alert--slim`;
       toastBody.classList.add("usa-alert__body");
       p.classList.add("usa-alert__text");
-      p.innerText = msg;
+      p.innerHTML = msg;
       toastBody.appendChild(p);
       toast.appendChild(toastBody);
       el.parentNode.insertBefore(toast, el.nextSibling);
     } else {
       // update and show the existing message div
       toast.className = `usa-alert usa-alert--${style} usa-alert--slim`;
-      toast.querySelector("div p").innerText = msg;
+      toast.querySelector("div p").innerHTML = msg;
       makeVisible(toast);
     }
   } else {
diff --git a/src/registrar/tests/test_views.py b/src/registrar/tests/test_views.py
index 0070d4119..0f653cf75 100644
--- a/src/registrar/tests/test_views.py
+++ b/src/registrar/tests/test_views.py
@@ -1219,6 +1219,8 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
         self.app.set_user(self.user.username)
         self.client.force_login(self.user)
 
+
+class TestDomainDetail(TestDomainOverview):
     def test_domain_detail_link_works(self):
         home_page = self.app.get("/")
         self.assertContains(home_page, "igorville.gov")
@@ -1227,7 +1229,7 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
         self.assertContains(detail_page, "igorville.gov")
         self.assertContains(detail_page, "Status")
 
-    def test_domain_overview_blocked_for_ineligible_user(self):
+    def test_domain_detail_blocked_for_ineligible_user(self):
         """We could easily duplicate this test for all domain management
         views, but a single url test should be solid enough since all domain
         management pages share the same permissions class"""
@@ -1239,7 +1241,7 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
             response = self.client.get(reverse("domain", kwargs={"pk": self.domain.id}))
             self.assertEqual(response.status_code, 403)
 
-    def test_domain_overview_allowed_for_on_hold(self):
+    def test_domain_detail_allowed_for_on_hold(self):
         """Test that the domain overview page displays for on hold domain"""
         home_page = self.app.get("/")
         self.assertContains(home_page, "on-hold.gov")
@@ -1248,7 +1250,7 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
         detail_page = self.client.get(reverse("domain", kwargs={"pk": self.domain_on_hold.id}))
         self.assertNotContains(detail_page, "Edit")
 
-    def test_domain_see_just_nameserver(self):
+    def test_domain_detail_see_just_nameserver(self):
         home_page = self.app.get("/")
         self.assertContains(home_page, "justnameserver.com")
 
@@ -1259,7 +1261,7 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
         self.assertContains(detail_page, "ns1.justnameserver.com")
         self.assertContains(detail_page, "ns2.justnameserver.com")
 
-    def test_domain_see_nameserver_and_ip(self):
+    def test_domain_detail_see_nameserver_and_ip(self):
         home_page = self.app.get("/")
         self.assertContains(home_page, "nameserverwithip.gov")
 
@@ -1275,7 +1277,7 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
         self.assertContains(detail_page, "(1.2.3.4,")
         self.assertContains(detail_page, "2.3.4.5)")
 
-    def test_domain_with_no_information_or_application(self):
+    def test_domain_detail_with_no_information_or_application(self):
         """Test that domain management page returns 200 and displays error
         when no domain information or domain application exist"""
         # have to use staff user for this test