diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454624.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454624.xml
index b6a79fd6..d8dcf62a 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454624.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454624.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A1" limsid="ACC7892A1" />
-    <reagent-label name="A01 UDP0001 (GAACTGAGCG-TCGTGGAGCG)" />
+    <reagent-label name="01_A01 UDP0001 (GAACTGAGCG-TCGTGGAGCG)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454625.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454625.xml
index 061e4c24..06e5bfc4 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454625.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454625.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A5" limsid="ACC7892A5" />
-    <reagent-label name="A02 UDP0009 (GACTGAGTAG-GTTGATAGTG)" />
+    <reagent-label name="09_A02 UDP0009 (GACTGAGTAG-GTTGATAGTG)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454626.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454626.xml
index b1149353..408e258c 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454626.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454626.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A9" limsid="ACC7892A9" />
-    <reagent-label name="A03 UDP0017 (GAGAATGGTT-TCGGCAGCAA)" />
+    <reagent-label name="17_A03 UDP0017 (GAGAATGGTT-TCGGCAGCAA)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454627.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454627.xml
index e3a01eae..6e5192bb 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454627.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454627.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A13" limsid="ACC7892A13" />
-    <reagent-label name="A04 UDP0025 (AACCATAGAA-GGCGAGATGG)" />
+    <reagent-label name="25_A04 UDP0025 (AACCATAGAA-GGCGAGATGG)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454628.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454628.xml
index 485526bb..8787955f 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454628.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454628.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A16" limsid="ACC7892A16" />
-    <reagent-label name="A05 UDP0033 (TGATTATACG-GTCGATTACA)" />
+    <reagent-label name="33_A05 UDP0033 (TGATTATACG-GTCGATTACA)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454629.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454629.xml
index eae68c11..dbb3e4f0 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454629.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454629.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A57" limsid="ACC7892A57" />
-    <reagent-label name="A06 UDP0041 (ACTCGGCAAT-GACAACTGAA)" />
+    <reagent-label name="41_A06 UDP0041 (ACTCGGCAAT-GACAACTGAA)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454630.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454630.xml
index 8639b6ca..dafbf41e 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454630.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454630.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A64" limsid="ACC7892A64" />
-    <reagent-label name="A07 UDP0049 (AGTGTTGCAC-CTGGTACACG)" />
+    <reagent-label name="49_A07 UDP0049 (AGTGTTGCAC-CTGGTACACG)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454631.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454631.xml
index 849fd4ef..28afeac8 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454631.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454631.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A65" limsid="ACC7892A65" />
-    <reagent-label name="A08 UDP0057 (TCTATCCTAA-CGTCGACTGG)" />
+    <reagent-label name="57_A08 UDP0057 (TCTATCCTAA-CGTCGACTGG)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454632.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454632.xml
index cb5d16ea..8a14fa1d 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454632.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454632.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A70" limsid="ACC7892A70" />
-    <reagent-label name="A09 UDP0065 (TAATGTGTCT-GTAAGGCATA)" />
+    <reagent-label name="65_A09 UDP0065 (TAATGTGTCT-GTAAGGCATA)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454633.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454633.xml
index 433324d5..9beb59d9 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454633.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454633.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A73" limsid="ACC7892A73" />
-    <reagent-label name="A10 UDP0073 (CCTGCGGAAC-ATCATAGGCT)" />
+    <reagent-label name="73_A10 UDP0073 (CCTGCGGAAC-ATCATAGGCT)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454634.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454634.xml
index d0844b00..87d8fffb 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454634.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454634.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A78" limsid="ACC7892A78" />
-    <reagent-label name="A11 UDP0081 (TGTCGCTGGT-TCGTCTGACT)" />
+    <reagent-label name="81_A11 UDP0081 (TGTCGCTGGT-TCGTCTGACT)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454635.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454635.xml
index 963f75a8..f6de40e6 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454635.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454635.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A81" limsid="ACC7892A81" />
-    <reagent-label name="A12 UDP0089 (GTCCGTAAGC-CGTGTATCTT)" />
+    <reagent-label name="89_A12 UDP0089 (GTCCGTAAGC-CGTGTATCTT)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454636.xml b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454636.xml
index 48f3df4c..2af92522 100644
--- a/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454636.xml
+++ b/tests/fixtures/hamilton_sars_cov2_indexing_step/artifacts/2-1454636.xml
@@ -11,6 +11,6 @@
     </location>
     <working-flag>true</working-flag>
     <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7892A92" limsid="ACC7892A92" />
-    <reagent-label name="B01 UDP0002 (AGGTCAGATA-CTACAAGATA)" />
+    <reagent-label name="02_B01 UDP0002 (AGGTCAGATA-CTACAAGATA)" />
     <workflow-stages />
 </art:artifact>
\ No newline at end of file
diff --git a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129.xml b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129.xml
index c705782c..126e58f8 100644
--- a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129.xml
+++ b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129.xml
@@ -10,7 +10,7 @@
 </location>
 <working-flag>true</working-flag>
 <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7271A5" limsid="ACC7271A5"/>
-<reagent-label name="A02 IDT_10nt_652 (ACAACCAACT-ACCATCTTGT)"/>
+<reagent-label name="09_A02 IDT_10nt_652 (ACAACCAACT-ACCATCTTGT)"/>
 <udf:field type="Numeric" name="Amount (ng)">375</udf:field>
 <udf:field type="Numeric" name="Volume of sample (ul)">15</udf:field>
 <udf:field type="Numeric" name="Concentration (nM)">103.464487677</udf:field>
diff --git a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129_other_sample.xml b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129_other_sample.xml
index fca1cae5..bc0e5af3 100644
--- a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129_other_sample.xml
+++ b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155129_other_sample.xml
@@ -10,7 +10,7 @@
 </location>
 <working-flag>true</working-flag>
 <sample uri="http://127.0.0.1:8000/api/v2/samples/dummy_sample1" limsid="dummy_sample1"/>
-<reagent-label name="A02 IDT_10nt_652 (ACAACCAACT-ACCATCTTGT)"/>
+<reagent-label name="09_A02 IDT_10nt_652 (ACAACCAACT-ACCATCTTGT)"/>
 <udf:field type="Numeric" name="Amount (ng)">375</udf:field>
 <udf:field type="Numeric" name="Volume of sample (ul)">15</udf:field>
 <udf:field type="Numeric" name="Concentration (nM)">103.464487677</udf:field>
diff --git a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130.xml b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130.xml
index c9424720..91a46344 100644
--- a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130.xml
+++ b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130.xml
@@ -10,7 +10,7 @@
 </location>
 <working-flag>true</working-flag>
 <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7272A2" limsid="ACC7272A2"/>
-<reagent-label name="A01 IDT_10nt_651 (ATGGTTGACT-GCTTGTGCCA)"/>
+<reagent-label name="01_A01 IDT_10nt_651 (ATGGTTGACT-GCTTGTGCCA)"/>
 <udf:field type="Numeric" name="Amount (ng)">1500</udf:field>
 <udf:field type="Numeric" name="Volume of sample (ul)">5</udf:field>
 <udf:field type="Numeric" name="Concentration (nM)">408.310256999</udf:field>
diff --git a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130_other_sample.xml b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130_other_sample.xml
index 64689211..f1b1be4e 100644
--- a/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130_other_sample.xml
+++ b/tests/fixtures/make_kapa_csv_missing_udfs/artifacts/2-1155130_other_sample.xml
@@ -10,7 +10,7 @@
 </location>
 <working-flag>true</working-flag>
 <sample uri="http://127.0.0.1:8000/api/v2/samples/dummy_sample2" limsid="dummy_sample2"/>
-<reagent-label name="A01 IDT_10nt_651 (ATGGTTGACT-GCTTGTGCCA)"/>
+<reagent-label name="01_A01 IDT_10nt_651 (ATGGTTGACT-GCTTGTGCCA)"/>
 <udf:field type="Numeric" name="Amount (ng)">1500</udf:field>
 <udf:field type="Numeric" name="Volume of sample (ul)">5</udf:field>
 <udf:field type="Numeric" name="Concentration (nM)">408.310256999</udf:field>
diff --git a/tests/fixtures/test_make_kapa_csv/artifacts/2-1155129.xml b/tests/fixtures/test_make_kapa_csv/artifacts/2-1155129.xml
index c705782c..126e58f8 100644
--- a/tests/fixtures/test_make_kapa_csv/artifacts/2-1155129.xml
+++ b/tests/fixtures/test_make_kapa_csv/artifacts/2-1155129.xml
@@ -10,7 +10,7 @@
 </location>
 <working-flag>true</working-flag>
 <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7271A5" limsid="ACC7271A5"/>
-<reagent-label name="A02 IDT_10nt_652 (ACAACCAACT-ACCATCTTGT)"/>
+<reagent-label name="09_A02 IDT_10nt_652 (ACAACCAACT-ACCATCTTGT)"/>
 <udf:field type="Numeric" name="Amount (ng)">375</udf:field>
 <udf:field type="Numeric" name="Volume of sample (ul)">15</udf:field>
 <udf:field type="Numeric" name="Concentration (nM)">103.464487677</udf:field>
diff --git a/tests/fixtures/test_make_kapa_csv/artifacts/2-1155130.xml b/tests/fixtures/test_make_kapa_csv/artifacts/2-1155130.xml
index c9424720..91a46344 100644
--- a/tests/fixtures/test_make_kapa_csv/artifacts/2-1155130.xml
+++ b/tests/fixtures/test_make_kapa_csv/artifacts/2-1155130.xml
@@ -10,7 +10,7 @@
 </location>
 <working-flag>true</working-flag>
 <sample uri="http://127.0.0.1:8000/api/v2/samples/ACC7272A2" limsid="ACC7272A2"/>
-<reagent-label name="A01 IDT_10nt_651 (ATGGTTGACT-GCTTGTGCCA)"/>
+<reagent-label name="01_A01 IDT_10nt_651 (ATGGTTGACT-GCTTGTGCCA)"/>
 <udf:field type="Numeric" name="Amount (ng)">1500</udf:field>
 <udf:field type="Numeric" name="Volume of sample (ul)">5</udf:field>
 <udf:field type="Numeric" name="Concentration (nM)">408.310256999</udf:field>