diff --git a/.gitignore b/.gitignore
index 038dd9f1e..e8d25f548 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ coverage.out
 *~
 coverage.txt
 profile.out
+.tmp/
\ No newline at end of file
diff --git a/go.mod b/go.mod
index ccb8facd1..512cc59ee 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/gliderlabs/ssh v0.2.2
 	github.com/go-git/gcfg v1.5.0
 	github.com/go-git/go-billy/v5 v5.3.1
-	github.com/go-git/go-git-fixtures/v4 v4.2.1
+	github.com/go-git/go-git-fixtures/v4 v4.3.1
 	github.com/google/go-cmp v0.3.0
 	github.com/imdario/mergo v0.3.12
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99
diff --git a/go.sum b/go.sum
index ab212c592..c4d7302b0 100644
--- a/go.sum
+++ b/go.sum
@@ -20,11 +20,12 @@ github.com/gliderlabs/ssh v0.2.2 h1:6zsha5zo/TWhRhwqCD3+EarCAgZ2yN28ipRnGPnwkI0=
 github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
 github.com/go-git/gcfg v1.5.0 h1:Q5ViNfGF8zFgyJWPqYwA7qGFoMTEiBmdlkcfRmpIMa4=
 github.com/go-git/gcfg v1.5.0/go.mod h1:5m20vg6GwYabIxaOonVkTdrILxQMpEShl1xiMF4ua+E=
-github.com/go-git/go-billy/v5 v5.2.0/go.mod h1:pmpqyWchKfYfrkb/UVH4otLvyi/5gJlGI4Hb3ZqZ3W0=
 github.com/go-git/go-billy/v5 v5.3.1 h1:CPiOUAzKtMRvolEKw+bG1PLRpT7D3LIs3/3ey4Aiu34=
 github.com/go-git/go-billy/v5 v5.3.1/go.mod h1:pmpqyWchKfYfrkb/UVH4otLvyi/5gJlGI4Hb3ZqZ3W0=
-github.com/go-git/go-git-fixtures/v4 v4.2.1 h1:n9gGL1Ct/yIw+nfsfr8s4+sbhT+Ncu2SubfXjIWgci8=
-github.com/go-git/go-git-fixtures/v4 v4.2.1/go.mod h1:K8zd3kDUAykwTdDCr+I0per6Y6vMiRR/nnVTBtavnB0=
+github.com/go-git/go-git-fixtures/v4 v4.3.0 h1:OAiwhtOsTVVUvVSLzwSO9PCCo/KPxGfn5aC3BV6d6TY=
+github.com/go-git/go-git-fixtures/v4 v4.3.0/go.mod h1:8LHG1a3SRW71ettAD/jW13h8c6AqjVSeL11RAdgaqpo=
+github.com/go-git/go-git-fixtures/v4 v4.3.1 h1:y5z6dd3qi8Hl+stezc8p3JxDkoTRqMAlKnXHuzrfjTQ=
+github.com/go-git/go-git-fixtures/v4 v4.3.1/go.mod h1:8LHG1a3SRW71ettAD/jW13h8c6AqjVSeL11RAdgaqpo=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/imdario/mergo v0.3.12 h1:b6R2BslTbIEToALKP7LxUvijTsNI9TAe80pLWN2g/HU=
diff --git a/plumbing/format/packfile/parser_test.go b/plumbing/format/packfile/parser_test.go
index 9c7e218f7..09f3f9704 100644
--- a/plumbing/format/packfile/parser_test.go
+++ b/plumbing/format/packfile/parser_test.go
@@ -133,10 +133,9 @@ func (s *ParserSuite) TestThinPack(c *C) {
 }
 
 func (s *ParserSuite) TestResolveExternalRefsInThinPack(c *C) {
-	f, err := os.Open("testdata/pack-9733763ae7ee6efcf452d373d6fff77424fb1dcc.pack")
-	c.Assert(err, IsNil)
+	extRefsThinPack := fixtures.ByTag("codecommit").One()
 
-	scanner := packfile.NewScanner(f)
+	scanner := packfile.NewScanner(extRefsThinPack.Packfile())
 
 	obs := new(testObserver)
 	parser, err := packfile.NewParser(scanner, obs)
diff --git a/plumbing/format/packfile/testdata/pack-9733763ae7ee6efcf452d373d6fff77424fb1dcc.pack b/plumbing/format/packfile/testdata/pack-9733763ae7ee6efcf452d373d6fff77424fb1dcc.pack
deleted file mode 100644
index 4a57a6155..000000000
Binary files a/plumbing/format/packfile/testdata/pack-9733763ae7ee6efcf452d373d6fff77424fb1dcc.pack and /dev/null differ