diff --git a/src/repositories/commits.jl b/src/repositories/commits.jl
index 5c6f144..adb45f2 100644
--- a/src/repositories/commits.jl
+++ b/src/repositories/commits.jl
@@ -25,16 +25,28 @@ namefield(commit::Commit) = commit.sha
 # API Methods #
 ###############
 
-@api_default function commits(api::GitHubAPI, repo; options...)
+# repo #
+#------#
+
+@api_default function commits(api::GitHubAPI, repo::Union{Repo,String}; options...)
     results, page_data = gh_get_paged_json(api, "/repos/$(name(repo))/commits"; options...)
     return map(Commit, results), page_data
 end
 
-@api_default function commit(api::GitHubAPI, repo, sha; options...)
+@api_default function commit(api::GitHubAPI, repo, sha::Union{Commit,String}; options...)
     result = gh_get_json(api, "/repos/$(name(repo))/commits/$(name(sha))"; options...)
     return Commit(result)
 end
 
+# pull request #
+#--------------#
+
+@api_default function commits(api::GitHubAPI, pr; options...)
+    repo = pr.base.repo
+    results, page_data = gh_get_paged_json(api, "/repos/$(name(repo))/pulls/$(name(pr))/commits"; options...)
+    return map(Commit, results), page_data
+end
+
 @api_default function commits(api::GitHubAPI, repo, pr; options...)
     results, page_data = gh_get_paged_json(api, "/repos/$(name(repo))/pulls/$(name(pr))/commits"; options...)
     return map(Commit, results), page_data
diff --git a/test/read_only_api_tests.jl b/test/read_only_api_tests.jl
index bd9b33f..15334b6 100644
--- a/test/read_only_api_tests.jl
+++ b/test/read_only_api_tests.jl
@@ -74,10 +74,6 @@ end
     @test name(branch(ghjl, "master"; auth = auth)) == "master"
     @test hasghobj("master", first(branches(ghjl; auth = auth)))
 
-    # test GitHub.commit, GitHub.commits
-    @test name(commit(ghjl, testcommit; auth = auth)) == name(testcommit)
-    @test hasghobj(testcommit, first(commits(ghjl; auth = auth)))
-
     # test GitHub.file, GitHub.directory, GitHub.readme, GitHub.permalink
     readme_file = file(ghjl, "README.md"; auth = auth)
     src_dir = first(directory(ghjl, "src"; auth = auth))
@@ -106,6 +102,24 @@ end
     # @test iscollaborator(ghjl, "jrevels"; auth = auth)
 end
 
+@testset "Commits" begin
+    # of a repo
+    @test name(commit(ghjl, testcommit; auth = auth)) == name(testcommit)
+    @test hasghobj(testcommit, first(commits(ghjl; auth = auth)))
+
+    # of a pull request
+    let pr = pull_request(ghjl, 37; auth = auth)
+        commit_vec, page_data = commits(pr)
+        @test commit_vec isa Vector{Commit}
+        @test length(commit_vec) == 1
+    end
+    let
+        commit_vec, page_data = commits(ghjl, 37)
+        @test commit_vec isa Vector{Commit}
+        @test length(commit_vec) == 1
+    end
+end
+
 @testset "Issues" begin
     state_param = Dict("state" => "all")