diff --git a/ImperatorToCK3.UnitTests/CK3/Titles/RulerTermTests.cs b/ImperatorToCK3.UnitTests/CK3/Titles/RulerTermTests.cs
index 9ce568395..cb4108a83 100644
--- a/ImperatorToCK3.UnitTests/CK3/Titles/RulerTermTests.cs
+++ b/ImperatorToCK3.UnitTests/CK3/Titles/RulerTermTests.cs
@@ -17,6 +17,7 @@
 using Xunit;
 using System;
 using System.Collections.Generic;
+using System.IO;
 
 namespace ImperatorToCK3.UnitTests.CK3.Titles;
 
@@ -49,8 +50,10 @@ public void ImperatorRulerTermIsCorrectlyConverted() {
 			"government = dictatorship"
 		);
 		var impRulerTerm = ImperatorToCK3.Imperator.Countries.RulerTerm.Parse(reader);
-		var govReader = new BufferedReader("link = {ir=dictatorship ck3=feudal_government }");
-		var govMapper = new GovernmentMapper(govReader, ck3GovernmentIds: new List<string> {"feudal_government"});
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", "link = {ir=dictatorship ck3=feudal_government }");
+		var govMapper = new GovernmentMapper(ck3GovernmentIds: new List<string> {"feudal_government"});
+		File.Delete("configurables/government_map.txt"); // cleanup
 		var landedTitles = new Title.LandedTitles();
 		var ck3Religions = new ReligionCollection(landedTitles);
 		var ck3RegionMapper = new CK3RegionMapper();
@@ -94,8 +97,10 @@ public void PreImperatorTermIsCorrectlyConverted() {
 		var landedTitles = new Title.LandedTitles();
 		var ck3Religions = new ReligionCollection(landedTitles);
 		ck3Religions.LoadReligions(ck3ModFs, new ColorFactory());
-		var govReader = new BufferedReader("link = {ir=dictatorship ck3=feudal_government }");
-		var govMapper = new GovernmentMapper(govReader, ck3GovernmentIds: new List<string> {"feudal_government"});
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", "link = {ir=dictatorship ck3=feudal_government }");
+		var govMapper = new GovernmentMapper(ck3GovernmentIds: new List<string> {"feudal_government"});
+		File.Delete("configurables/government_map.txt"); // cleanup
 		var ck3RegionMapper = new CK3RegionMapper();
 		var religionMapper = new ReligionMapper(
 			new BufferedReader("link={ir=hellenic ck3=hellenic}"),
diff --git a/ImperatorToCK3.UnitTests/Mappers/Government/GovernmentMapperTests.cs b/ImperatorToCK3.UnitTests/Mappers/Government/GovernmentMapperTests.cs
index 1ccedd748..e4bd5824c 100644
--- a/ImperatorToCK3.UnitTests/Mappers/Government/GovernmentMapperTests.cs
+++ b/ImperatorToCK3.UnitTests/Mappers/Government/GovernmentMapperTests.cs
@@ -1,30 +1,41 @@
-using commonItems;
-using ImperatorToCK3.CK3.Titles;
+using ImperatorToCK3.CK3.Titles;
 using ImperatorToCK3.Mappers.Government;
 using System.Collections.Generic;
+using System.IO;
 using Xunit;
 
 namespace ImperatorToCK3.UnitTests.Mappers.Government;
 
+[Collection("Sequential")]
+[CollectionDefinition("Sequential", DisableParallelization = true)]
 public class GovernmentMapperTests {
 	[Fact]
 	public void NonMatchGivesNull() {
-		var reader = new BufferedReader("link = { ck3 = ck3Government ir = irGovernment }");
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: new List<string> { "ck3Government" });
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", "link = { ck3 = ck3Government ir = irGovernment }");
+		var mapper = new GovernmentMapper(ck3GovernmentIds: new List<string> { "ck3Government" });
+		File.Delete("configurables/government_map.txt"); // cleanup
+		
 		var ck3Gov = mapper.GetCK3GovernmentForImperatorGovernment("nonMatchingGovernment", rank: null, irCultureId: null, []);
 		Assert.Null(ck3Gov);
 	}
 	[Fact]
 	public void CK3GovernmentCanBeFound() {
-		var reader = new BufferedReader("link = { ck3 = ck3Government ir = irGovernment }");
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: new List<string> { "ck3Government" });
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", "link = { ck3 = ck3Government ir = irGovernment }");
+		var mapper = new GovernmentMapper(ck3GovernmentIds: new List<string> { "ck3Government" });
+		File.Delete("configurables/government_map.txt"); // cleanup
+		
 		var ck3Gov = mapper.GetCK3GovernmentForImperatorGovernment("irGovernment", rank: null, irCultureId: null, []);
 		Assert.Equal("ck3Government", ck3Gov);
 	}
 	[Fact]
 	public void MultipleImperatorGovernmentsCanBeInARule() {
-		var reader = new BufferedReader("link = { ck3 = ck3Government ir = irGovernment ir = irGovernment2 }");
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: new List<string> { "ck3Government" });
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", "link = { ck3 = ck3Government ir = irGovernment ir = irGovernment2 }");
+		var mapper = new GovernmentMapper(ck3GovernmentIds: new List<string> { "ck3Government" });
+		File.Delete("configurables/government_map.txt"); // cleanup
+		
 		var ck3Gov1 = mapper.GetCK3GovernmentForImperatorGovernment("irGovernment", rank: null, irCultureId: null, []);
 		var ck3Gov2 = mapper.GetCK3GovernmentForImperatorGovernment("irGovernment2", rank: null, irCultureId: null, []);
 		Assert.Equal("ck3Government", ck3Gov1);
@@ -32,23 +43,29 @@ public void MultipleImperatorGovernmentsCanBeInARule() {
 	}
 	[Fact]
 	public void CorrectRuleMatches() {
-		var reader = new BufferedReader(
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt",
 			"link = { ck3 = ck3Government ir = irGovernment }\n" +
 			"link = { ck3 = ck3Government2 ir = irGovernment2 }"
 		);
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: new List<string> { "ck3Government", "ck3Government2" });
+		var mapper = new GovernmentMapper(ck3GovernmentIds: new List<string> { "ck3Government", "ck3Government2" });
+		File.Delete("configurables/government_map.txt"); // cleanup
+		
 		var ck3Gov = mapper.GetCK3GovernmentForImperatorGovernment("irGovernment2", rank: null, irCultureId: null, []);
 		Assert.Equal("ck3Government2", ck3Gov);
 	}
 
 	[Fact]
 	public void CultureCanBeUsedToMatch() {
-		var reader = new BufferedReader(
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", 
 			"link = { ck3 = govA ir = irGovernment irCulture = roman }\n" +
 			"link = { ck3 = govB ir = irGovernment irCulture = greek }\n" +
 			"link = { ck3 = govC ir = irGovernment }"
 		);
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: new List<string> { "govA", "govB", "govC" });
+		var mapper = new GovernmentMapper(ck3GovernmentIds: new List<string> { "govA", "govB", "govC" });
+		File.Delete("configurables/government_map.txt"); // cleanup
+		
 		Assert.Equal("govA", mapper.GetCK3GovernmentForImperatorGovernment("irGovernment", rank: null, "roman", []));
 		Assert.Equal("govB", mapper.GetCK3GovernmentForImperatorGovernment("irGovernment", rank: null, "greek", []));
 		Assert.Equal("govC", mapper.GetCK3GovernmentForImperatorGovernment("irGovernment", rank: null, "thracian", []));
@@ -57,13 +74,15 @@ public void CultureCanBeUsedToMatch() {
 
 	[Fact]
 	public void CK3TitleRankCanBeUsedToMatch() {
-		var reader = new BufferedReader(
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt", 
 			"""
 			link = { ck3 = administrative_government ir = imperium ck3_title_rank = ke } # only for kingdoms and empires
 			link = { ck3 = feudal_government ir = imperium }
 			"""
 		);
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: [ "administrative_government", "feudal_government" ]);
+		var mapper = new GovernmentMapper(ck3GovernmentIds: [ "administrative_government", "feudal_government" ]);
+		File.Delete("configurables/government_map.txt"); // cleanup
 
 		foreach (var rank in new List<TitleRank> { TitleRank.empire, TitleRank.kingdom }) {
 			Assert.Equal("administrative_government",
@@ -79,7 +98,8 @@ public void CK3TitleRankCanBeUsedToMatch() {
 
 	[Fact]
 	public void CK3DlcCanBeUsedToMatch() {
-		var reader = new BufferedReader(
+		Directory.CreateDirectory("configurables");
+		File.WriteAllText("configurables/government_map.txt",
 			"""
 			link = { ck3 = administrative_government
 				has_ck3_dlc = roads_to_power
@@ -91,7 +111,8 @@ public void CK3DlcCanBeUsedToMatch() {
 				ir = imperial_cult # When the user doesn't have the Roads to Power DLC.
 			}
 			""");
-		var mapper = new GovernmentMapper(reader, ck3GovernmentIds: [ "administrative_government", "feudal_government" ]);
+		var mapper = new GovernmentMapper(ck3GovernmentIds: [ "administrative_government", "feudal_government" ]);
+		File.Delete("configurables/government_map.txt"); // cleanup
 			
 		Assert.Equal("administrative_government", mapper.GetCK3GovernmentForImperatorGovernment("imperium", rank: null, irCultureId: null, enabledCK3Dlcs: ["roads_to_power"]));
 		Assert.Equal("feudal_government", mapper.GetCK3GovernmentForImperatorGovernment("imperium", rank: null, irCultureId: null, enabledCK3Dlcs: []));
diff --git a/ImperatorToCK3/Mappers/Government/GovernmentMapper.cs b/ImperatorToCK3/Mappers/Government/GovernmentMapper.cs
index a1fea521f..6af10b921 100644
--- a/ImperatorToCK3/Mappers/Government/GovernmentMapper.cs
+++ b/ImperatorToCK3/Mappers/Government/GovernmentMapper.cs
@@ -2,12 +2,11 @@
 using ImperatorToCK3.CK3.Titles;
 using System;
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
 
 namespace ImperatorToCK3.Mappers.Government;
 
-public sealed class GovernmentMapper {
+internal sealed class GovernmentMapper {
 	private readonly List<GovernmentMapping> mappings = [];
 
 	public GovernmentMapper(ICollection<string> ck3GovernmentIds) {
@@ -15,21 +14,13 @@ public GovernmentMapper(ICollection<string> ck3GovernmentIds) {
 
 		var parser = new Parser();
 		RegisterKeys(parser);
-		var mappingsPath = Path.Combine("configurables", "government_map.txt");
-		parser.ParseFile(mappingsPath);
+		parser.ParseFile("configurables/government_map.txt");
 
 		Logger.Info($"Loaded {mappings.Count} government links.");
 		
 		Logger.Debug("Removing invalid government links...");
 		RemoveInvalidLinks(ck3GovernmentIds);
 	}
-	public GovernmentMapper(BufferedReader reader, ICollection<string> ck3GovernmentIds) { // used for testing only, TODO: remove
-		var parser = new Parser();
-		RegisterKeys(parser);
-		parser.ParseStream(reader);
-		
-		RemoveInvalidLinks(ck3GovernmentIds);
-	}
 	private void RegisterKeys(Parser parser) {
 		parser.RegisterKeyword("link", reader => {
 			var mapping = new GovernmentMapping(reader);