diff --git a/.gitattributes b/.gitattributes
index d13338c..e69de29 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +0,0 @@
-test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa filter=lfs diff=lfs merge=lfs -text
-test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa filter=lfs diff=lfs merge=lfs -text
diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index c43439f..32d1680 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -12,8 +12,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-        with:
-          lfs: 'true'
 
       - name: Set up JDK 17
         uses: actions/setup-java@v2
diff --git a/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa b/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa
deleted file mode 100644
index 9df5a63..0000000
--- a/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:69d1b92c83b9390b26e34986e92afb24680cdc2b44866a0cb356b2087f5841c1
-size 253105752
diff --git a/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz b/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz
new file mode 100644
index 0000000..fcdf047
Binary files /dev/null and b/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz differ
diff --git a/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa b/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa
deleted file mode 100644
index c642012..0000000
--- a/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5890d81dbfcfdda99eac4bfe7a6378b38bed583c101ede6ee0a02b2ec5b51961
-size 246230144
diff --git a/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa.gz b/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa.gz
new file mode 100644
index 0000000..4e85f76
Binary files /dev/null and b/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa.gz differ
diff --git a/tests/modules/hostRemoval/hostRemoval.nf.test b/tests/modules/hostRemoval/hostRemoval.nf.test
index c929856..012254d 100644
--- a/tests/modules/hostRemoval/hostRemoval.nf.test
+++ b/tests/modules/hostRemoval/hostRemoval.nf.test
@@ -13,7 +13,7 @@ nextflow_workflow {
                     projName = "testHR"
                 }
                 hostRemoval {
-                    host = ["${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa"]
+                    host = ["${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz"]
                     cpus = 4
                 }
                 
@@ -45,7 +45,7 @@ nextflow_workflow {
                     projName = "testHR"
                 }
                 hostRemoval {
-                    host = "${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa"
+                    host = "${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz"
                     cpus = 4
                 }
                 
@@ -77,7 +77,7 @@ nextflow_workflow {
                     projName = "testHR"
                 }
                 hostRemoval {
-                    host = ["${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa", "${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa"]
+                    host = ["${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz", "${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa.gz"]
                     cpus = 4
                 }
             }
@@ -109,7 +109,7 @@ nextflow_workflow {
                     projName = "testHR"
                 }
                 hostRemoval {
-                    host = ["${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa","${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa"]
+                    host = ["${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.1.fa.gz","${projectDir}/test_data/Homo_sapiens.GRCh38.dna.chromosome.2.fa.gz"]
                     cpus = 4
                 }
             }