diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 64ca409d1..419e6f27a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -28,4 +28,5 @@ jobs:
         run: make -j3 DMD=${{ startsWith(matrix.dc, 'ldc') && 'ldmd2' || 'dmd' }}
       - name: Test
         shell: bash
-        run: make -j3 DMD=${{ startsWith(matrix.dc, 'ldc') && 'ldmd2' || 'dmd' }} test
+        # /tmp is a symlink on Mac, and rdmd_test.d doesn't like it
+        run: ${{ startsWith(matrix.os, 'macos') && 'TMPDIR=$(cd /tmp && pwd -P)' || '' }} make -j3 DMD=${{ startsWith(matrix.dc, 'ldc') && 'ldmd2' || 'dmd' }} test
diff --git a/rdmd_test.d b/rdmd_test.d
index cb7cd2f07..881569887 100755
--- a/rdmd_test.d
+++ b/rdmd_test.d
@@ -431,7 +431,7 @@ void runTests(string rdmdApp, string compiler, string model)
 
         res = execute(rdmdArgs ~ [forceSrc.baseName()]);
         enforce(res.status == 0, res.output);
-        enforce(!res.output.canFind("compile_force_src"));
+        enforce(!res.output.canFind("compile_force_src"), res.output);
     }
 
     auto conflictDir = forceSrc.setExtension(".dir");
@@ -690,20 +690,5 @@ void runFallbackTest(string rdmdApp, string buildCompiler, string model)
 
     auto res = execute(rdmdApp ~ [modelSwitch(model), "--force", "--chatty", "--eval=writeln(`Compiler found.`);"]);
     enforce(res.status == 1, res.output);
-
-    bool didSpawnExecutable(string executable) {
-        return res.output.canFind(format(`spawn [%(%s%),`, executable.only));
-    }
-
-    auto spawned = didSpawnExecutable(localDMD);
-    version (OSX)
-    {
-        // weird stuff for GitHub Actions at least:
-        // * localDMD is absolute `/var/folders/3s/vfzpb5r51gs6y328rmlgzm7c0000gn/T/dmd`
-        // * rdmd tries to spawn `/private/var/folders/3s/vfzpb5r51gs6y328rmlgzm7c0000gn/T/dmd`
-        if (!spawned)
-            spawned = didSpawnExecutable("/private" ~ localDMD);
-    }
-
-    enforce(spawned, localDMD ~ " would not have been executed. Output:\n" ~ res.output);
+    enforce(res.output.canFind(format(`spawn [%(%s%),`, localDMD.only)), localDMD ~ " would not have been executed. Output:\n" ~ res.output);
 }