diff --git a/case_utils/case_sparql_select/__init__.py b/case_utils/case_sparql_select/__init__.py
index 424848c..eaa98cb 100644
--- a/case_utils/case_sparql_select/__init__.py
+++ b/case_utils/case_sparql_select/__init__.py
@@ -33,6 +33,7 @@
 import logging
 import os
 import sys
+import typing
 
 import pandas as pd  # type: ignore
 import rdflib.plugins.sparql
@@ -77,7 +78,7 @@ def main() -> None:
     )
     parser.add_argument(
         "out_table",
-        help="Expected extensions are .html for HTML tables or .md for Markdown tables.",
+        help="Expected extensions are .html for HTML tables, .md for Markdown tables, .csv for comma-separated values, and .tsv for tab-separated values.",
     )
     parser.add_argument(
         "in_sparql",
@@ -146,8 +147,20 @@ def main() -> None:
 
     df = pd.DataFrame(records, columns=variables)
 
-    table_text = None
-    if args.out_table.endswith(".html"):
+    table_text: typing.Optional[str] = None
+    if args.out_table.endswith(".csv") or args.out_table.endswith(".tsv"):
+        # https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.to_csv.html
+        sep: str
+        if args.out_table.endswith(".csv"):
+            sep = ","
+        elif args.out_table.endswith(".tsv"):
+            sep = "\t"
+        else:
+            raise NotImplementedError(
+                "Output extension not implemented in CSV-style output."
+            )
+        table_text = df.to_csv(sep=sep)
+    elif args.out_table.endswith(".html"):
         # https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.to_html.html
         # Add CSS classes for CASE website Bootstrap support.
         table_text = df.to_html(classes=("table", "table-bordered", "table-condensed"))
diff --git a/tests/case_utils/case_sparql_select/.check-prefixed_results.csv b/tests/case_utils/case_sparql_select/.check-prefixed_results.csv
new file mode 100644
index 0000000..60d4b78
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/.check-prefixed_results.csv
@@ -0,0 +1,3 @@
+,?nFile
+0,kb:file-1
+1,kb:file-2
diff --git a/tests/case_utils/case_sparql_select/.check-prefixed_results.tsv b/tests/case_utils/case_sparql_select/.check-prefixed_results.tsv
new file mode 100644
index 0000000..9dac11d
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/.check-prefixed_results.tsv
@@ -0,0 +1,3 @@
+	?nFile
+0	kb:file-1
+1	kb:file-2
diff --git a/tests/case_utils/case_sparql_select/.check-w3-output.csv b/tests/case_utils/case_sparql_select/.check-w3-output.csv
new file mode 100644
index 0000000..063e950
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/.check-w3-output.csv
@@ -0,0 +1,3 @@
+,?name,?mbox
+0,Johnny Lee Outlaw,mailto:jlow@example.com
+1,Peter Goodguy,mailto:peter@example.org
diff --git a/tests/case_utils/case_sparql_select/.check-w3-output.tsv b/tests/case_utils/case_sparql_select/.check-w3-output.tsv
new file mode 100644
index 0000000..a4fdfca
--- /dev/null
+++ b/tests/case_utils/case_sparql_select/.check-w3-output.tsv
@@ -0,0 +1,3 @@
+	?name	?mbox
+0	Johnny Lee Outlaw	mailto:jlow@example.com
+1	Peter Goodguy	mailto:peter@example.org
diff --git a/tests/case_utils/case_sparql_select/Makefile b/tests/case_utils/case_sparql_select/Makefile
index 6431be7..68f11ec 100644
--- a/tests/case_utils/case_sparql_select/Makefile
+++ b/tests/case_utils/case_sparql_select/Makefile
@@ -18,19 +18,25 @@ top_srcdir := $(shell cd ../../.. ; pwd)
 tests_srcdir := $(top_srcdir)/tests
 
 all: \
+  prefixed_results.csv \
   prefixed_results.html \
   prefixed_results.md \
+  prefixed_results.tsv \
   subclass-explicit-none.md \
   subclass-implicit-any.md \
+  w3-output.csv \
   w3-output.html \
-  w3-output.md
+  w3-output.md \
+  w3-output.tsv
 
 .PHONY: \
   check-subclass \
   check-subclass-explicit-none \
   check-subclass-implicit-any \
+  check-w3-csv \
   check-w3-html \
-  check-w3-markdown
+  check-w3-markdown \
+  check-w3-tsv
 
 .PRECIOUS: \
   prefixed_results.% \
@@ -38,14 +44,23 @@ all: \
   w3-output.%
 
 check: \
+  check-w3-csv \
   check-w3-html \
   check-w3-markdown \
+  check-w3-tsv \
   check-prefixed_results \
   check-subclass
 
 check-prefixed_results: \
+  check-prefixed_results-csv \
   check-prefixed_results-html \
-  check-prefixed_results-md
+  check-prefixed_results-md \
+  check-prefixed_results-tsv
+
+check-prefixed_results-csv: \
+  .check-prefixed_results.csv \
+  prefixed_results.csv
+	diff $^
 
 check-prefixed_results-html: \
   .check-prefixed_results.html \
@@ -57,6 +72,11 @@ check-prefixed_results-md: \
   prefixed_results.md
 	diff $^
 
+check-prefixed_results-tsv: \
+  .check-prefixed_results.tsv \
+  prefixed_results.tsv
+	diff $^
+
 check-subclass: \
   check-subclass-explicit-none \
   check-subclass-implicit-any
@@ -71,6 +91,11 @@ check-subclass-implicit-any: \
   subclass-implicit-any.md
 	diff $^
 
+check-w3-csv: \
+  .check-w3-output.csv \
+  w3-output.csv
+	diff $^
+
 check-w3-html: \
   .check-w3-output.html \
   w3-output.html
@@ -81,12 +106,19 @@ check-w3-markdown: \
   w3-output.md
 	diff $^
 
+check-w3-tsv: \
+  .check-w3-output.tsv \
+  w3-output.tsv
+	diff $^
+
 clean:
 	@rm -rf \
 	  __pycache__
 	@rm -f \
+	  *.csv \
 	  *.html \
 	  *.md \
+	  *.tsv \
 	  _*
 
 prefixed_results.%: \