diff --git a/changelogs/unreleased/kassio-github-importer-add-missing-importes-caches.yml b/changelogs/unreleased/kassio-github-importer-add-missing-importes-caches.yml
new file mode 100644
index 0000000000000000000000000000000000000000..d949cba7a2d65ec79f23a5311aff34766c3b67ab
--- /dev/null
+++ b/changelogs/unreleased/kassio-github-importer-add-missing-importes-caches.yml
@@ -0,0 +1,5 @@
+---
+title: 'Github Importer: Add Cache to Pull Request Reviews importer'
+merge_request: 60668
+author:
+type: changed
diff --git a/lib/gitlab/github_import/client.rb b/lib/gitlab/github_import/client.rb
index 328f1f742c51d948805a4e85397a385b980cad54..138716b1b53bf4cd0e9654012dd34fbbdbad16cb 100644
--- a/lib/gitlab/github_import/client.rb
+++ b/lib/gitlab/github_import/client.rb
@@ -70,7 +70,7 @@ def user(username)
       end
 
       def pull_request_reviews(repo_name, iid)
-        with_rate_limit { octokit.pull_request_reviews(repo_name, iid) }
+        each_object(:pull_request_reviews, repo_name, iid)
       end
 
       # Returns the details of a GitHub repository.
diff --git a/lib/gitlab/github_import/importer/pull_requests_merged_by_importer.rb b/lib/gitlab/github_import/importer/pull_requests_merged_by_importer.rb
index 466288fde4c88c6518f2a839580aab160f2483b4..94472cd341eb2a2e247756a6ce44319dd0bc414a 100644
--- a/lib/gitlab/github_import/importer/pull_requests_merged_by_importer.rb
+++ b/lib/gitlab/github_import/importer/pull_requests_merged_by_importer.rb
@@ -22,14 +22,18 @@ def collection_method
           :pull_requests_merged_by
         end
 
-        def id_for_already_imported_cache(pr)
-          pr.number
+        def id_for_already_imported_cache(merge_request)
+          merge_request.id
         end
 
         def each_object_to_import
           project.merge_requests.with_state(:merged).find_each do |merge_request|
+            next if already_imported?(merge_request)
+
             pull_request = client.pull_request(project.import_source, merge_request.iid)
             yield(pull_request)
+
+            mark_as_imported(merge_request)
           end
         end
       end
diff --git a/lib/gitlab/github_import/importer/pull_requests_reviews_importer.rb b/lib/gitlab/github_import/importer/pull_requests_reviews_importer.rb
index 6d1b588f0e01b7d1dc807f65955d0cbbcb386132..827027203ff40f55a73eafa7f25be8abf6d94bc9 100644
--- a/lib/gitlab/github_import/importer/pull_requests_reviews_importer.rb
+++ b/lib/gitlab/github_import/importer/pull_requests_reviews_importer.rb
@@ -22,17 +22,22 @@ def collection_method
           :pull_request_reviews
         end
 
-        def id_for_already_imported_cache(review)
-          review.github_id
+        def id_for_already_imported_cache(merge_request)
+          merge_request.id
         end
 
         def each_object_to_import
           project.merge_requests.find_each do |merge_request|
-            reviews = client.pull_request_reviews(project.import_source, merge_request.iid)
-            reviews.each do |review|
-              review.merge_request_id = merge_request.id
-              yield(review)
-            end
+            next if already_imported?(merge_request)
+
+            client
+              .pull_request_reviews(project.import_source, merge_request.iid)
+              .each do |review|
+                review.merge_request_id = merge_request.id
+                yield(review)
+              end
+
+            mark_as_imported(merge_request)
           end
         end
       end
diff --git a/spec/lib/gitlab/github_import/client_spec.rb b/spec/lib/gitlab/github_import/client_spec.rb
index 4000e0b2611514a69377e180a9b3a7b017c4de3c..194dfb228ee464dd4fdd6a8ed83d89c43305910c 100644
--- a/spec/lib/gitlab/github_import/client_spec.rb
+++ b/spec/lib/gitlab/github_import/client_spec.rb
@@ -32,8 +32,9 @@
     it 'returns the pull request reviews' do
       client = described_class.new('foo')
 
-      expect(client.octokit).to receive(:pull_request_reviews).with('foo/bar', 999)
-      expect(client).to receive(:with_rate_limit).and_yield
+      expect(client)
+        .to receive(:each_object)
+        .with(:pull_request_reviews, 'foo/bar', 999)
 
       client.pull_request_reviews('foo/bar', 999)
     end
diff --git a/spec/lib/gitlab/github_import/importer/pull_requests_merged_by_importer_spec.rb b/spec/lib/gitlab/github_import/importer/pull_requests_merged_by_importer_spec.rb
index b859cc727a668b5429fa390d5ce102818a2a93f3..4a47d103cde507970bd72ca57d6b51ee9f49b88d 100644
--- a/spec/lib/gitlab/github_import/importer/pull_requests_merged_by_importer_spec.rb
+++ b/spec/lib/gitlab/github_import/importer/pull_requests_merged_by_importer_spec.rb
@@ -23,12 +23,11 @@
   end
 
   describe '#id_for_already_imported_cache' do
-    it { expect(subject.id_for_already_imported_cache(double(number: 1))).to eq(1) }
+    it { expect(subject.id_for_already_imported_cache(double(id: 1))).to eq(1) }
   end
 
-  describe '#each_object_to_import' do
+  describe '#each_object_to_import', :clean_gitlab_redis_cache do
     it 'fetchs the merged pull requests data' do
-      pull_request = double
       create(
         :merged_merge_request,
         iid: 999,
@@ -36,12 +35,18 @@
         target_project: project
       )
 
+      pull_request = double
+
       allow(client)
         .to receive(:pull_request)
+        .exactly(:once) # ensure to be cached on the second call
         .with('http://somegithub.com', 999)
         .and_return(pull_request)
 
-      expect { |b| subject.each_object_to_import(&b) }.to yield_with_args(pull_request)
+      expect { |b| subject.each_object_to_import(&b) }
+        .to yield_with_args(pull_request)
+
+      subject.each_object_to_import {}
     end
   end
 end
diff --git a/spec/lib/gitlab/github_import/importer/pull_requests_reviews_importer_spec.rb b/spec/lib/gitlab/github_import/importer/pull_requests_reviews_importer_spec.rb
index 5e2302f96625ca8e917178a1a0457184dfa20477..f18064f10aab7d09ff1da98396c7d261006bf85d 100644
--- a/spec/lib/gitlab/github_import/importer/pull_requests_reviews_importer_spec.rb
+++ b/spec/lib/gitlab/github_import/importer/pull_requests_reviews_importer_spec.rb
@@ -23,12 +23,18 @@
   end
 
   describe '#id_for_already_imported_cache' do
-    it { expect(subject.id_for_already_imported_cache(double(github_id: 1))).to eq(1) }
+    it { expect(subject.id_for_already_imported_cache(double(id: 1))).to eq(1) }
   end
 
-  describe '#each_object_to_import' do
+  describe '#each_object_to_import', :clean_gitlab_redis_cache do
     it 'fetchs the merged pull requests data' do
-      merge_request = create(:merge_request, source_project: project)
+      merge_request = create(
+        :merged_merge_request,
+        iid: 999,
+        source_project: project,
+        target_project: project
+      )
+
       review = double
 
       expect(review)
@@ -37,10 +43,14 @@
 
       allow(client)
         .to receive(:pull_request_reviews)
+        .exactly(:once) # ensure to be cached on the second call
         .with('github/repo', merge_request.iid)
         .and_return([review])
 
-      expect { |b| subject.each_object_to_import(&b) }.to yield_with_args(review)
+      expect { |b| subject.each_object_to_import(&b) }
+        .to yield_with_args(review)
+
+      subject.each_object_to_import {}
     end
   end
 end