diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 66a068dc9..2f033c02b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -172,7 +172,13 @@ endfunction()
 # --- Unit tests ------------------------------------------------------------------
 
 cockatrice_add_test(NAME expression_test SOURCES expression_test.cpp LIBS libcockatrice_utility)
-cockatrice_add_test(NAME essence_types_test SOURCES essence_types_test.cpp LIBS libcockatrice_card)
+# XML v3/v4 exporters in libcockatrice_card reference VERSION_STRING.
+# Link the same generated version implementation used by the client/server.
+cockatrice_add_test(
+  NAME essence_types_test
+  SOURCES ${VERSION_STRING_CPP} essence_types_test.cpp
+  LIBS libcockatrice_card
+)
 cockatrice_add_test(NAME clamped_arithmetic_test SOURCES clamped_arithmetic_test.cpp LIBS libcockatrice_utility)
 cockatrice_add_test(NAME test_age_formatting SOURCES test_age_formatting.cpp LIBS libcockatrice_utility)
 cockatrice_add_test(NAME user_data_backup_test SOURCES user_data_backup_test.cpp LIBS libcockatrice_utility)