diff --git a/tests/data/strain_mappings.csv b/tests/data/strain_mappings.csv
deleted file mode 100644
index 8ae78b56..00000000
--- a/tests/data/strain_mappings.csv
+++ /dev/null
@@ -1,27 +0,0 @@
-Salinispora arenicola CNB527,42b.mzXML
-Salinispora arenicola CNT005,NZ_AZWU01000037,NZ_KI911492,NZ_AZWU01000047,GCF_000514895,NZ_AZWU01000018,NZ_AZWU01000036,NZ_AZWU01000007,GCF_000514895.1,NZ_AZWU01000017,NZ_AZWU01000052,NZ_AZWU01000030,NZ_KI911493,NZ_AZWU01000054,NZ_AZWU01000031,NZ_KI911490,NZ_AZWU01000064,NZ_AZWU01000029,NZ_AZWU01000023,NZ_AZWU01000020,NZ_AZWU01000039,NZ_AZWU01000019,12c.mzXML,NZ_AZWU01000022,NZ_KI911494,NZ_AZWU01000045,12b.mzXML,NZ_AZWU01000021,NZ_AZWU01000038,NZ_AZWU01000046
-Salinispora arenicola CNS205,NC_009953,13a.mzXML,GCF_000018265,13b.mzXML,GCF_000018265.1
-Salinispora arenicola CNH646,NZ_AZWH01000027,NZ_AZWH01000004,NZ_AZWH01000050,NZ_AZWH01000017,NZ_AZWH01000001,NZ_AZWH01000023,NZ_AZWH01000010,GCF_000514635,NZ_AZWH01000005,NZ_AZWH01000022,NZ_AZWH01000015,GCF_000514635.1,15a.mzXML,NZ_AZWH01000048,15b.mzXML,NZ_AZWH01000019,NZ_AZWH01000008,NZ_AZWH01000009,NZ_AZWH01000024,NZ_AZWH01000035,NZ_AZWH01000040,NZ_AZWH01000016,NZ_AZWH01000014
-Salinispora arenicola CNQ748,NZ_AZWY01000070,NZ_AZWY01000017,NZ_AZWY01000050,NZ_AZWY01000016,NZ_KI911506,NZ_AZWY01000007,GCF_000514975.1,NZ_AZWY01000010,GCF_000514975,NZ_AZWY01000055,NZ_AZWY01000025,NZ_AZWY01000034,NZ_AZWY01000041,16b.mzXML,NZ_AZWY01000063,NZ_AZWY01000045,NZ_AZWY01000048,NZ_AZWY01000058,NZ_AZWY01000020,NZ_AZWY01000032,NZ_AZWY01000006,NZ_AZWY01000021,NZ_AZWY01000040,NZ_AZWY01000011,NZ_AZWY01000023,NZ_AZWY01000009,NZ_AZWY01000053,NZ_AZWY01000008,NZ_AZWY01000005,16a.mzXML,NZ_AZWY01000019
-Salinispora arenicola CNT849,GCF_000373825.1,NZ_KB892511,NZ_KB892473,NZ_KB892499,NZ_KB892514,NZ_KB892480,17a.mzXML,GCF_000373825,NZ_KB892479,NZ_KB892482,NZ_KB892490,NZ_KB892476,NZ_KB892481,NZ_KB892500,NZ_KB892485,NZ_KB892505,NZ_KB892497,NZ_KB892501,NZ_KB892477,NZ_KB892494,NZ_KB892475,NZ_KB892483,17b.mzXML,NZ_KB892478,NZ_KB892474,NZ_KB892507
-Salinispora arenicola CNP193,18a.mzXML,18b.mzXML
-Salinispora arenicola CNX508,NZ_AZWT01000002,NZ_AZWT01000016,NZ_AZWT01000034,NZ_AZWT01000032,NZ_AZWT01000018,GCF_000514875,NZ_AZWT01000008,NZ_AZWT01000036,NZ_AZWT01000004,NZ_AZWT01000027,NZ_AZWT01000057,NZ_AZWT01000001,NZ_AZWT01000015,NZ_AZWT01000003,NZ_AZWT01000009,NZ_AZWT01000059,NZ_AZWT01000021,20a.mzXML,NZ_AZWT01000005,GCF_000514875.1,NZ_AZWT01000010,NZ_AZWT01000035,NZ_AZWT01000080,NZ_AZWT01000047,NZ_AZWT01000020
-Salinispora pacifica CNR114,9b.mzXML,NZ_AZWO01000060,NZ_AZWO01000029,GCF_000514775.1,NZ_AZWO01000016,NZ_AZWO01000034,NZ_AZWO01000025,NZ_AZWO01000036,NZ_AZWO01000028,NZ_AZWO01000053,NZ_AZWO01000038,NZ_AZWO01000072,NZ_AZWO01000011,NZ_AZWO01000056,NZ_AZWO01000007,NZ_AZWO01000061,GCF_000514775,NZ_KI911467,NZ_AZWO01000019,NZ_AZWO01000008,NZ_AZWO01000004,NZ_AZWO01000048,9a.mzXML,NZ_AZWO01000014,NZ_KI911468,NZ_AZWO01000027
-Salinispora pacifica CNR894,41a.mzXML
-Salinispora pacifica CNR942,NZ_KB894861,NZ_KB894873,NZ_KB894848,NZ_KB894883,NZ_KB894871,NZ_KB894851,NZ_KB894875,NZ_KB894863,GCF_000374665.1,34c.mzXML,GCF_000374665,34b.mzXML,NZ_KB894878,NZ_KB894866,NZ_KB894859,NZ_KB894850,NZ_KB894860,NZ_KB894857,NZ_KB894856,NZ_KB894854,NZ_KB894865
-Salinispora pacifica CNS055,NZ_KB894967,NZ_KB894982,11a.mzXML,NZ_KB894966,NZ_KB895001,NZ_KB894969,NZ_KB894963,NZ_KB894993,NZ_KB894962,NZ_KB894970,NZ_KB895000,NZ_KB894991,NZ_KB894971,NZ_KB894979,NZ_KB894997,11c.mzXML,GCF_000374685,NZ_KB894980,NZ_KB895006,NZ_KB894992,GCF_000374685.1
-Salinispora pacifica CNS237,NZ_AUGH01000017,8a.mzXML,GCF_000424905.1,NZ_KE384268,NZ_AUGH01000011,NZ_AUGH01000032,NZ_AUGH01000028,NZ_KE384271,8b.mzXML,NZ_AUGH01000045,NZ_AUGH01000035,NZ_KE384269,NZ_AUGH01000027,NZ_AUGH01000015,NZ_KE384272,GCF_000424905,NZ_AUGH01000030,NZ_AUGH01000019
-Salinispora pacifica CNS863,22a.mzXML,22b.mzXML
-Salinispora pacifica CNT003,26c.mzXML,26a.mzXML
-Salinispora pacifica CNT029,NZ_AZWB01000024,GCF_000514515.1,NZ_AZWB01000013,NZ_AZWB01000012,NZ_AZWB01000006,NZ_AZWB01000016,NZ_KI911413,NZ_AZWB01000005,NZ_KI911416,NZ_KI911414,NZ_KI911412,27a.mzXML,GCF_000514515,27b.mzXML
-Salinispora pacifica CNT138,19a.mzXML,19c.mzXML
-Salinispora pacifica CNT148,25c.mzXML,25b.mzXML
-Salinispora pacifica CNT150,23a.mzXML
-Salinispora pacifica CNT851,35b.mzXML,35a.mzXML
-Salinispora pacifica CNT855,NZ_AZWS01000028,NZ_AZWS01000004,29a.mzXML,NZ_KI911483,NZ_AZWS01000040,NZ_AZWS01000038,NZ_AZWS01000048,NZ_AZWS01000025,GCF_000514855,NZ_AZWS01000012,NZ_AZWS01000024,NZ_AZWS01000036,NZ_AZWS01000051,GCF_000514855.1,NZ_AZWS01000008,NZ_AZWS01000001,NZ_AZWS01000014,NZ_AZWS01000053,NZ_AZWS01000016,NZ_AZWS01000037,NZ_AZWS01000015,NZ_AZWS01000062,NZ_AZWS01000013,NZ_AZWS01000034
-Salinispora pacifica CNY202,7a.mzXML,7b.mzXML
-Salinispora pacifica CNY330,10b.mzXML
-Salinispora tropica CNB536,2a.mzXML,2b.mzXML
-Salinispora tropica CNY012,5a.mzXML,5b.mzXML
-Salinispora tropica CNS197,NZ_AZWK01000006,NZ_AZWK01000009,36a.mzXML,NZ_AZWK01000061,NZ_KI911452,NZ_AZWK01000027,NZ_AZWK01000038,GCF_000514695.1,NZ_AZWK01000002,NZ_KI911456,NZ_AZWK01000021,GCF_000514695,36b.mzXML,NZ_AZWK01000022,NZ_AZWK01000003,NZ_AZWK01000019,NZ_KI911458
-Salinispora tropica CNB440,38b.mzXML,38a.mzXML,GCF_000016425,NC_009380,GCF_000016425.1
diff --git a/tests/data/strain_mappings.json b/tests/data/strain_mappings.json
new file mode 100644
index 00000000..49d2e055
--- /dev/null
+++ b/tests/data/strain_mappings.json
@@ -0,0 +1,447 @@
+{
+  "strain_mappings": [
+    {
+      "strain_id": "Salinispora arenicola CNB527",
+      "strain_alias": [
+        "42b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNT005",
+      "strain_alias": [
+        "NZ_AZWU01000037",
+        "NZ_KI911492",
+        "NZ_AZWU01000047",
+        "GCF_000514895",
+        "NZ_AZWU01000018",
+        "NZ_AZWU01000036",
+        "NZ_AZWU01000007",
+        "GCF_000514895.1",
+        "NZ_AZWU01000017",
+        "NZ_AZWU01000052",
+        "NZ_AZWU01000030",
+        "NZ_KI911493",
+        "NZ_AZWU01000054",
+        "NZ_AZWU01000031",
+        "NZ_KI911490",
+        "NZ_AZWU01000064",
+        "NZ_AZWU01000029",
+        "NZ_AZWU01000023",
+        "NZ_AZWU01000020",
+        "NZ_AZWU01000039",
+        "NZ_AZWU01000019",
+        "12c.mzXML",
+        "NZ_AZWU01000022",
+        "NZ_KI911494",
+        "NZ_AZWU01000045",
+        "12b.mzXML",
+        "NZ_AZWU01000021",
+        "NZ_AZWU01000038",
+        "NZ_AZWU01000046"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNS205",
+      "strain_alias": [
+        "NC_009953",
+        "13a.mzXML",
+        "GCF_000018265",
+        "13b.mzXML",
+        "GCF_000018265.1"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNH646",
+      "strain_alias": [
+        "NZ_AZWH01000027",
+        "NZ_AZWH01000004",
+        "NZ_AZWH01000050",
+        "NZ_AZWH01000017",
+        "NZ_AZWH01000001",
+        "NZ_AZWH01000023",
+        "NZ_AZWH01000010",
+        "GCF_000514635",
+        "NZ_AZWH01000005",
+        "NZ_AZWH01000022",
+        "NZ_AZWH01000015",
+        "GCF_000514635.1",
+        "15a.mzXML",
+        "NZ_AZWH01000048",
+        "15b.mzXML",
+        "NZ_AZWH01000019",
+        "NZ_AZWH01000008",
+        "NZ_AZWH01000009",
+        "NZ_AZWH01000024",
+        "NZ_AZWH01000035",
+        "NZ_AZWH01000040",
+        "NZ_AZWH01000016",
+        "NZ_AZWH01000014"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNQ748",
+      "strain_alias": [
+        "NZ_AZWY01000070",
+        "NZ_AZWY01000017",
+        "NZ_AZWY01000050",
+        "NZ_AZWY01000016",
+        "NZ_KI911506",
+        "NZ_AZWY01000007",
+        "GCF_000514975.1",
+        "NZ_AZWY01000010",
+        "GCF_000514975",
+        "NZ_AZWY01000055",
+        "NZ_AZWY01000025",
+        "NZ_AZWY01000034",
+        "NZ_AZWY01000041",
+        "16b.mzXML",
+        "NZ_AZWY01000063",
+        "NZ_AZWY01000045",
+        "NZ_AZWY01000048",
+        "NZ_AZWY01000058",
+        "NZ_AZWY01000020",
+        "NZ_AZWY01000032",
+        "NZ_AZWY01000006",
+        "NZ_AZWY01000021",
+        "NZ_AZWY01000040",
+        "NZ_AZWY01000011",
+        "NZ_AZWY01000023",
+        "NZ_AZWY01000009",
+        "NZ_AZWY01000053",
+        "NZ_AZWY01000008",
+        "NZ_AZWY01000005",
+        "16a.mzXML",
+        "NZ_AZWY01000019"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNT849",
+      "strain_alias": [
+        "GCF_000373825.1",
+        "NZ_KB892511",
+        "NZ_KB892473",
+        "NZ_KB892499",
+        "NZ_KB892514",
+        "NZ_KB892480",
+        "17a.mzXML",
+        "GCF_000373825",
+        "NZ_KB892479",
+        "NZ_KB892482",
+        "NZ_KB892490",
+        "NZ_KB892476",
+        "NZ_KB892481",
+        "NZ_KB892500",
+        "NZ_KB892485",
+        "NZ_KB892505",
+        "NZ_KB892497",
+        "NZ_KB892501",
+        "NZ_KB892477",
+        "NZ_KB892494",
+        "NZ_KB892475",
+        "NZ_KB892483",
+        "17b.mzXML",
+        "NZ_KB892478",
+        "NZ_KB892474",
+        "NZ_KB892507"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNP193",
+      "strain_alias": [
+        "18a.mzXML",
+        "18b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora arenicola CNX508",
+      "strain_alias": [
+        "NZ_AZWT01000002",
+        "NZ_AZWT01000016",
+        "NZ_AZWT01000034",
+        "NZ_AZWT01000032",
+        "NZ_AZWT01000018",
+        "GCF_000514875",
+        "NZ_AZWT01000008",
+        "NZ_AZWT01000036",
+        "NZ_AZWT01000004",
+        "NZ_AZWT01000027",
+        "NZ_AZWT01000057",
+        "NZ_AZWT01000001",
+        "NZ_AZWT01000015",
+        "NZ_AZWT01000003",
+        "NZ_AZWT01000009",
+        "NZ_AZWT01000059",
+        "NZ_AZWT01000021",
+        "20a.mzXML",
+        "NZ_AZWT01000005",
+        "GCF_000514875.1",
+        "NZ_AZWT01000010",
+        "NZ_AZWT01000035",
+        "NZ_AZWT01000080",
+        "NZ_AZWT01000047",
+        "NZ_AZWT01000020"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNR114",
+      "strain_alias": [
+        "9b.mzXML",
+        "NZ_AZWO01000060",
+        "NZ_AZWO01000029",
+        "GCF_000514775.1",
+        "NZ_AZWO01000016",
+        "NZ_AZWO01000034",
+        "NZ_AZWO01000025",
+        "NZ_AZWO01000036",
+        "NZ_AZWO01000028",
+        "NZ_AZWO01000053",
+        "NZ_AZWO01000038",
+        "NZ_AZWO01000072",
+        "NZ_AZWO01000011",
+        "NZ_AZWO01000056",
+        "NZ_AZWO01000007",
+        "NZ_AZWO01000061",
+        "GCF_000514775",
+        "NZ_KI911467",
+        "NZ_AZWO01000019",
+        "NZ_AZWO01000008",
+        "NZ_AZWO01000004",
+        "NZ_AZWO01000048",
+        "9a.mzXML",
+        "NZ_AZWO01000014",
+        "NZ_KI911468",
+        "NZ_AZWO01000027"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNR894",
+      "strain_alias": [
+        "41a.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNR942",
+      "strain_alias": [
+        "NZ_KB894861",
+        "NZ_KB894873",
+        "NZ_KB894848",
+        "NZ_KB894883",
+        "NZ_KB894871",
+        "NZ_KB894851",
+        "NZ_KB894875",
+        "NZ_KB894863",
+        "GCF_000374665.1",
+        "34c.mzXML",
+        "GCF_000374665",
+        "34b.mzXML",
+        "NZ_KB894878",
+        "NZ_KB894866",
+        "NZ_KB894859",
+        "NZ_KB894850",
+        "NZ_KB894860",
+        "NZ_KB894857",
+        "NZ_KB894856",
+        "NZ_KB894854",
+        "NZ_KB894865"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNS055",
+      "strain_alias": [
+        "NZ_KB894967",
+        "NZ_KB894982",
+        "11a.mzXML",
+        "NZ_KB894966",
+        "NZ_KB895001",
+        "NZ_KB894969",
+        "NZ_KB894963",
+        "NZ_KB894993",
+        "NZ_KB894962",
+        "NZ_KB894970",
+        "NZ_KB895000",
+        "NZ_KB894991",
+        "NZ_KB894971",
+        "NZ_KB894979",
+        "NZ_KB894997",
+        "11c.mzXML",
+        "GCF_000374685",
+        "NZ_KB894980",
+        "NZ_KB895006",
+        "NZ_KB894992",
+        "GCF_000374685.1"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNS237",
+      "strain_alias": [
+        "NZ_AUGH01000017",
+        "8a.mzXML",
+        "GCF_000424905.1",
+        "NZ_KE384268",
+        "NZ_AUGH01000011",
+        "NZ_AUGH01000032",
+        "NZ_AUGH01000028",
+        "NZ_KE384271",
+        "8b.mzXML",
+        "NZ_AUGH01000045",
+        "NZ_AUGH01000035",
+        "NZ_KE384269",
+        "NZ_AUGH01000027",
+        "NZ_AUGH01000015",
+        "NZ_KE384272",
+        "GCF_000424905",
+        "NZ_AUGH01000030",
+        "NZ_AUGH01000019"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNS863",
+      "strain_alias": [
+        "22a.mzXML",
+        "22b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT003",
+      "strain_alias": [
+        "26c.mzXML",
+        "26a.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT029",
+      "strain_alias": [
+        "NZ_AZWB01000024",
+        "GCF_000514515.1",
+        "NZ_AZWB01000013",
+        "NZ_AZWB01000012",
+        "NZ_AZWB01000006",
+        "NZ_AZWB01000016",
+        "NZ_KI911413",
+        "NZ_AZWB01000005",
+        "NZ_KI911416",
+        "NZ_KI911414",
+        "NZ_KI911412",
+        "27a.mzXML",
+        "GCF_000514515",
+        "27b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT138",
+      "strain_alias": [
+        "19a.mzXML",
+        "19c.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT148",
+      "strain_alias": [
+        "25c.mzXML",
+        "25b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT150",
+      "strain_alias": [
+        "23a.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT851",
+      "strain_alias": [
+        "35b.mzXML",
+        "35a.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNT855",
+      "strain_alias": [
+        "NZ_AZWS01000028",
+        "NZ_AZWS01000004",
+        "29a.mzXML",
+        "NZ_KI911483",
+        "NZ_AZWS01000040",
+        "NZ_AZWS01000038",
+        "NZ_AZWS01000048",
+        "NZ_AZWS01000025",
+        "GCF_000514855",
+        "NZ_AZWS01000012",
+        "NZ_AZWS01000024",
+        "NZ_AZWS01000036",
+        "NZ_AZWS01000051",
+        "GCF_000514855.1",
+        "NZ_AZWS01000008",
+        "NZ_AZWS01000001",
+        "NZ_AZWS01000014",
+        "NZ_AZWS01000053",
+        "NZ_AZWS01000016",
+        "NZ_AZWS01000037",
+        "NZ_AZWS01000015",
+        "NZ_AZWS01000062",
+        "NZ_AZWS01000013",
+        "NZ_AZWS01000034"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNY202",
+      "strain_alias": [
+        "7a.mzXML",
+        "7b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora pacifica CNY330",
+      "strain_alias": [
+        "10b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora tropica CNB536",
+      "strain_alias": [
+        "2a.mzXML",
+        "2b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora tropica CNY012",
+      "strain_alias": [
+        "5a.mzXML",
+        "5b.mzXML"
+      ]
+    },
+    {
+      "strain_id": "Salinispora tropica CNS197",
+      "strain_alias": [
+        "NZ_AZWK01000006",
+        "NZ_AZWK01000009",
+        "36a.mzXML",
+        "NZ_AZWK01000061",
+        "NZ_KI911452",
+        "NZ_AZWK01000027",
+        "NZ_AZWK01000038",
+        "GCF_000514695.1",
+        "NZ_AZWK01000002",
+        "NZ_KI911456",
+        "NZ_AZWK01000021",
+        "GCF_000514695",
+        "36b.mzXML",
+        "NZ_AZWK01000022",
+        "NZ_AZWK01000003",
+        "NZ_AZWK01000019",
+        "NZ_KI911458"
+      ]
+    },
+    {
+      "strain_id": "Salinispora tropica CNB440",
+      "strain_alias": [
+        "38b.mzXML",
+        "38a.mzXML",
+        "GCF_000016425",
+        "NC_009380",
+        "GCF_000016425.1"
+      ]
+    }
+  ],
+  "version": "1.0"
+}