diff --git a/test/lib/LibCodeGen.addressConstantString.t.sol b/test/src/lib/LibCodeGen.addressConstantString.t.sol
similarity index 99%
rename from test/lib/LibCodeGen.addressConstantString.t.sol
rename to test/src/lib/LibCodeGen.addressConstantString.t.sol
index 18f4967..536dd4b 100644
--- a/test/lib/LibCodeGen.addressConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.addressConstantString.t.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen, MAX_LINE_LENGTH} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
 
 /// @dev A checksummed address literal, 42 characters like every other, so the
 /// declaration is `72 + name.length` characters long on one line.
diff --git a/test/lib/LibCodeGen.bytecodeHashConstantString.t.sol b/test/src/lib/LibCodeGen.bytecodeHashConstantString.t.sol
similarity index 98%
rename from test/lib/LibCodeGen.bytecodeHashConstantString.t.sol
rename to test/src/lib/LibCodeGen.bytecodeHashConstantString.t.sol
index 705ea48..23bb39c 100644
--- a/test/lib/LibCodeGen.bytecodeHashConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.bytecodeHashConstantString.t.sol
@@ -4,8 +4,8 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen, MAX_LINE_LENGTH, CodelessInstance} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
-import {CodeGennable} from "../concrete/CodeGennable.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
+import {CodeGennable} from "test/concrete/CodeGennable.sol";
 
 /// @title LibCodeGenBytecodeHashConstantStringTest
 /// @notice `bytecodeHashConstantString` emits the one constant that every
diff --git a/test/lib/LibCodeGen.bytes32ConstantString.t.sol b/test/src/lib/LibCodeGen.bytes32ConstantString.t.sol
similarity index 98%
rename from test/lib/LibCodeGen.bytes32ConstantString.t.sol
rename to test/src/lib/LibCodeGen.bytes32ConstantString.t.sol
index 0c86e15..dc3df79 100644
--- a/test/lib/LibCodeGen.bytes32ConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.bytes32ConstantString.t.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen, MAX_LINE_LENGTH} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
 
 /// @dev A `bytes32` literal is 66 characters whatever the value, so the
 /// declaration is `96 + name.length` characters long on one line.
diff --git a/test/lib/LibCodeGen.bytesConstantString.t.sol b/test/src/lib/LibCodeGen.bytesConstantString.t.sol
similarity index 99%
rename from test/lib/LibCodeGen.bytesConstantString.t.sol
rename to test/src/lib/LibCodeGen.bytesConstantString.t.sol
index f3cf2ea..c66670c 100644
--- a/test/lib/LibCodeGen.bytesConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.bytesConstantString.t.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen, MAX_LINE_LENGTH} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
 
 /// @dev 32 bytes, so the hex literal is 64 characters and the whole declaration
 /// is `24 + name.length + 64` characters on one line.
diff --git a/test/lib/LibCodeGen.commentPrefix.t.sol b/test/src/lib/LibCodeGen.commentPrefix.t.sol
similarity index 96%
rename from test/lib/LibCodeGen.commentPrefix.t.sol
rename to test/src/lib/LibCodeGen.commentPrefix.t.sol
index 73580df..e123c94 100644
--- a/test/lib/LibCodeGen.commentPrefix.t.sol
+++ b/test/src/lib/LibCodeGen.commentPrefix.t.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
 
 /// @title LibCodeGenCommentPrefixTest
 /// @notice `commentPrefix` is the one rule every constant declaration shares:
diff --git a/test/lib/LibCodeGen.describedByMetaHashConstantString.t.sol b/test/src/lib/LibCodeGen.describedByMetaHashConstantString.t.sol
similarity index 99%
rename from test/lib/LibCodeGen.describedByMetaHashConstantString.t.sol
rename to test/src/lib/LibCodeGen.describedByMetaHashConstantString.t.sol
index 5d03790..f9fceb5 100644
--- a/test/lib/LibCodeGen.describedByMetaHashConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.describedByMetaHashConstantString.t.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen, MAX_LINE_LENGTH, InvalidContractName} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
 
 /// @dev `describedByMetaHashConstantString` reads `meta/<name>.rain.meta`, and
 /// this repo's `fs_permissions` grants read-write on `meta`, so a fixture goes
diff --git a/test/lib/LibCodeGen.filePrefix.t.sol b/test/src/lib/LibCodeGen.filePrefix.t.sol
similarity index 100%
rename from test/lib/LibCodeGen.filePrefix.t.sol
rename to test/src/lib/LibCodeGen.filePrefix.t.sol
diff --git a/test/lib/LibCodeGen.integrityFunctionPointersConstantString.t.sol b/test/src/lib/LibCodeGen.integrityFunctionPointersConstantString.t.sol
similarity index 95%
rename from test/lib/LibCodeGen.integrityFunctionPointersConstantString.t.sol
rename to test/src/lib/LibCodeGen.integrityFunctionPointersConstantString.t.sol
index 4e14431..b52e76f 100644
--- a/test/lib/LibCodeGen.integrityFunctionPointersConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.integrityFunctionPointersConstantString.t.sol
@@ -5,8 +5,8 @@ pragma solidity =0.8.25;
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen} from "src/lib/LibCodeGen.sol";
 import {IIntegrityToolingV1} from "src/interface/IIntegrityToolingV1.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
-import {ToolingMock} from "../concrete/ToolingMock.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
+import {ToolingMock} from "test/concrete/ToolingMock.sol";
 
 /// @dev The comment the library puts above this constant, spelled out here so
 /// that a change to it fails rather than moving both sides at once. This is the
diff --git a/test/lib/LibCodeGen.literalParserFunctionPointersConstantString.t.sol b/test/src/lib/LibCodeGen.literalParserFunctionPointersConstantString.t.sol
similarity index 96%
rename from test/lib/LibCodeGen.literalParserFunctionPointersConstantString.t.sol
rename to test/src/lib/LibCodeGen.literalParserFunctionPointersConstantString.t.sol
index 872e5e7..d112443 100644
--- a/test/lib/LibCodeGen.literalParserFunctionPointersConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.literalParserFunctionPointersConstantString.t.sol
@@ -5,8 +5,8 @@ pragma solidity =0.8.25;
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen} from "src/lib/LibCodeGen.sol";
 import {IParserToolingV1} from "src/interface/IParserToolingV1.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
-import {ToolingMock} from "../concrete/ToolingMock.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
+import {ToolingMock} from "test/concrete/ToolingMock.sol";
 
 /// @dev The comment the library puts above this constant, spelled out here so
 /// that a change to it fails rather than moving both sides at once.
diff --git a/test/lib/LibCodeGen.opcodeFunctionPointersConstantString.t.sol b/test/src/lib/LibCodeGen.opcodeFunctionPointersConstantString.t.sol
similarity index 95%
rename from test/lib/LibCodeGen.opcodeFunctionPointersConstantString.t.sol
rename to test/src/lib/LibCodeGen.opcodeFunctionPointersConstantString.t.sol
index e99c5a2..3b5e81e 100644
--- a/test/lib/LibCodeGen.opcodeFunctionPointersConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.opcodeFunctionPointersConstantString.t.sol
@@ -5,8 +5,8 @@ pragma solidity =0.8.25;
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen} from "src/lib/LibCodeGen.sol";
 import {IOpcodeToolingV1} from "src/interface/IOpcodeToolingV1.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
-import {ToolingMock} from "../concrete/ToolingMock.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
+import {ToolingMock} from "test/concrete/ToolingMock.sol";
 
 /// @dev The comment the library puts above this constant, spelled out here so
 /// that a change to it fails rather than moving both sides at once.
diff --git a/test/lib/LibCodeGen.operandHandlerFunctionPointersConstantString.t.sol b/test/src/lib/LibCodeGen.operandHandlerFunctionPointersConstantString.t.sol
similarity index 95%
rename from test/lib/LibCodeGen.operandHandlerFunctionPointersConstantString.t.sol
rename to test/src/lib/LibCodeGen.operandHandlerFunctionPointersConstantString.t.sol
index 53e437f..6e2b382 100644
--- a/test/lib/LibCodeGen.operandHandlerFunctionPointersConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.operandHandlerFunctionPointersConstantString.t.sol
@@ -5,8 +5,8 @@ pragma solidity =0.8.25;
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen} from "src/lib/LibCodeGen.sol";
 import {IParserToolingV1} from "src/interface/IParserToolingV1.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
-import {ToolingMock} from "../concrete/ToolingMock.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
+import {ToolingMock} from "test/concrete/ToolingMock.sol";
 
 /// @dev The comment the library puts above this constant, spelled out here so
 /// that a change to it fails rather than moving both sides at once.
diff --git a/test/lib/LibCodeGen.requireContractName.t.sol b/test/src/lib/LibCodeGen.requireContractName.t.sol
similarity index 100%
rename from test/lib/LibCodeGen.requireContractName.t.sol
rename to test/src/lib/LibCodeGen.requireContractName.t.sol
diff --git a/test/lib/LibCodeGen.subParserWordParsersConstantString.t.sol b/test/src/lib/LibCodeGen.subParserWordParsersConstantString.t.sol
similarity index 96%
rename from test/lib/LibCodeGen.subParserWordParsersConstantString.t.sol
rename to test/src/lib/LibCodeGen.subParserWordParsersConstantString.t.sol
index 73f4af8..1a7b8e6 100644
--- a/test/lib/LibCodeGen.subParserWordParsersConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.subParserWordParsersConstantString.t.sol
@@ -5,8 +5,8 @@ pragma solidity =0.8.25;
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen} from "src/lib/LibCodeGen.sol";
 import {ISubParserToolingV1} from "src/interface/ISubParserToolingV1.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
-import {ToolingMock} from "../concrete/ToolingMock.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
+import {ToolingMock} from "test/concrete/ToolingMock.sol";
 
 /// @dev The comment the library puts above this constant, spelled out here so
 /// that a change to it fails rather than moving both sides at once.
diff --git a/test/lib/LibCodeGen.uint8ConstantString.t.sol b/test/src/lib/LibCodeGen.uint8ConstantString.t.sol
similarity index 98%
rename from test/lib/LibCodeGen.uint8ConstantString.t.sol
rename to test/src/lib/LibCodeGen.uint8ConstantString.t.sol
index 9496a41..79cd209 100644
--- a/test/lib/LibCodeGen.uint8ConstantString.t.sol
+++ b/test/src/lib/LibCodeGen.uint8ConstantString.t.sol
@@ -4,7 +4,7 @@ pragma solidity =0.8.25;
 
 import {Test} from "forge-std-1.16.1/src/Test.sol";
 import {LibCodeGen, MAX_LINE_LENGTH} from "src/lib/LibCodeGen.sol";
-import {LibCodeGenSlow} from "./LibCodeGenSlow.sol";
+import {LibCodeGenSlow} from "test/lib/LibCodeGenSlow.sol";
 
 /// @title LibCodeGenUint8ConstantStringTest
 /// @notice `uint8ConstantString` emits a Solidity `uint8 constant` declaration
diff --git a/test/lib/LibFs.buildFileForContract.t.sol b/test/src/lib/LibFs.buildFileForContract.t.sol
similarity index 100%
rename from test/lib/LibFs.buildFileForContract.t.sol
rename to test/src/lib/LibFs.buildFileForContract.t.sol
diff --git a/test/lib/LibFs.t.sol b/test/src/lib/LibFs.t.sol
similarity index 100%
rename from test/lib/LibFs.t.sol
rename to test/src/lib/LibFs.t.sol
diff --git a/test/lib/LibHexString.bytesToHex.t.sol b/test/src/lib/LibHexString.bytesToHex.t.sol
similarity index 100%
rename from test/lib/LibHexString.bytesToHex.t.sol
rename to test/src/lib/LibHexString.bytesToHex.t.sol