diff --git a/compiler/test/compilable/stdcheaders.c b/compiler/test/compilable/stdcheaders.c
index 03690ea320..c460a00384 100644
--- a/compiler/test/compilable/stdcheaders.c
+++ b/compiler/test/compilable/stdcheaders.c
@@ -59,19 +59,23 @@ float x = NAN;
 
 #ifndef _MSC_VER // C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\tgmath.h(33): Error: no type for declarator before `)`
 #ifndef __APPLE__ // /Applications/Xcode-14.2.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/tgmath.h(39): Error: named parameter required before `...`
+#ifndef __OpenBSD__ // /usr/lib/clang/13.0.0/include/tgmath.h(34): Error: named parameter required before `...`
 #if !(defined(__linux__) && defined(__aarch64__)) // /tmp/clang/lib/clang/15.0.3/include/tgmath.h(34): Error: named parameter required before `...`
 #include <tgmath.h>
 #endif
 #endif
 #endif
+#endif
 
 #ifndef __linux__
 #ifndef __APPLE__
+#ifndef __OpenBSD__
 #ifndef _MSC_VER
 #include <threads.h>
 #endif
 #endif
 #endif
+#endif
 
 #include <time.h>
 
diff --git a/compiler/test/compilable/test21672.d b/compiler/test/compilable/test21672.d
index c69f57d1c0..abad340fcc 100644
--- a/compiler/test/compilable/test21672.d
+++ b/compiler/test/compilable/test21672.d
@@ -1,5 +1,5 @@
 // REQUIRED_ARGS: -mcpu=avx2 -O
-// DISABLED: win32 linux32 freebsd32
+// DISABLED: win32 linux32 freebsd32 openbsd32
 
 // https://issues.dlang.org/show_bug.cgi?id=21672
 
diff --git a/compiler/test/compilable/test22346.c b/compiler/test/compilable/test22346.c
index e24e713fa9..9d1444ad74 100644
--- a/compiler/test/compilable/test22346.c
+++ b/compiler/test/compilable/test22346.c
@@ -1,4 +1,4 @@
-/* DISABLED: win32 win64 linux32 osx32 osx64 freebsd32
+/* DISABLED: win32 win64 linux32 osx32 osx64 freebsd32 openbsd32
  */
 
 // https://issues.dlang.org/show_bug.cgi?id=23346
diff --git a/compiler/test/fail_compilation/fail17105.d b/compiler/test/fail_compilation/fail17105.d
index eeb37c9640..407c40222c 100644
--- a/compiler/test/fail_compilation/fail17105.d
+++ b/compiler/test/fail_compilation/fail17105.d
@@ -1,5 +1,5 @@
 /* REQUIRED_ARGS: -m64
-DISABLED: win32 linux32 osx32 freebsd32
+DISABLED: win32 linux32 osx32 freebsd32 openbsd32
 TEST_OUTPUT:
 ---
 fail_compilation/fail17105.d(20): Error: missing 4th parameter to `__simd()`
diff --git a/compiler/test/fail_compilation/fail18372.d b/compiler/test/fail_compilation/fail18372.d
index d1612d2bfa..6100894bb0 100644
--- a/compiler/test/fail_compilation/fail18372.d
+++ b/compiler/test/fail_compilation/fail18372.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: win32 win64 linux32 osx32 freebsd32
+DISABLED: win32 win64 linux32 osx32 freebsd32 openbsd32
 TEST_OUTPUT:
 ---
 fail_compilation/fail18372.d(103): Error: `__va_list_tag` is not defined, perhaps `import core.stdc.stdarg;` ?
diff --git a/compiler/test/fail_compilation/fail6451.d b/compiler/test/fail_compilation/fail6451.d
index 10a7fbdfa6..fcc1d76a70 100644
--- a/compiler/test/fail_compilation/fail6451.d
+++ b/compiler/test/fail_compilation/fail6451.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: win32 win64 linux32 osx32 freebsd32
+DISABLED: win32 win64 linux32 osx32 freebsd32 openbsd32
 TEST_OUTPUT:
 ---
 fail_compilation/fail6451.d(9): Error: `__va_list_tag` is not defined, perhaps `import core.stdc.stdarg;` ?
diff --git a/compiler/test/fail_compilation/ice20042.d b/compiler/test/fail_compilation/ice20042.d
index 6b71903c9c..7a674b3c54 100644
--- a/compiler/test/fail_compilation/ice20042.d
+++ b/compiler/test/fail_compilation/ice20042.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: freebsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32
 TEST_OUTPUT:
 ---
 fail_compilation/ice20042.d(18): Error: slice operation `cast(__vector(float[4]))[nanF, nanF, nanF, nanF] = [1.0F, 2.0F, 3.0F, 4.0F][0..4]` cannot be evaluated at compile time
diff --git a/compiler/test/fail_compilation/ice20264.d b/compiler/test/fail_compilation/ice20264.d
index df6667d9e4..a8a1e7119b 100644
--- a/compiler/test/fail_compilation/ice20264.d
+++ b/compiler/test/fail_compilation/ice20264.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: freebsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32
 TEST_OUTPUT:
 ---
 fail_compilation/ice20264.d(12): Error: cannot modify expression `cast(__vector(float[4]))a` because it is not an lvalue
diff --git a/compiler/test/fail_compilation/impconv.d b/compiler/test/fail_compilation/impconv.d
index cb1cb8e21e..0cc2deb13d 100644
--- a/compiler/test/fail_compilation/impconv.d
+++ b/compiler/test/fail_compilation/impconv.d
@@ -3,7 +3,7 @@ FIXME: DMD host compilers < 2.073 with faulty optimization
 lead to unfortunate test failures, see
 https://github.com/dlang/dmd/pull/6831#issuecomment-304495842.
 
-DISABLED: win32 win64 linux osx freebsd
+DISABLED: win32 win64 linux osx freebsd openbsd
 */
 
 /*
diff --git a/compiler/test/fail_compilation/vector_types.d b/compiler/test/fail_compilation/vector_types.d
index 72c36f4f64..322bbc66cb 100644
--- a/compiler/test/fail_compilation/vector_types.d
+++ b/compiler/test/fail_compilation/vector_types.d
@@ -1,7 +1,7 @@
 /*
 REQUIRED_ARGS: -o-
 TEST_OUTPUT:
-DISABLED: freebsd32 linux32 osx32 win32
+DISABLED: freebsd32 openbsd32 linux32 osx32 win32
 ---
 fail_compilation/vector_types.d(15): Error: 32 byte vector type `__vector(double[4])` is not supported on this platform
 fail_compilation/vector_types.d(16): Error: 32 byte vector type `__vector(float[8])` is not supported on this platform
diff --git a/compiler/test/fail_compilation/xmmslice.d b/compiler/test/fail_compilation/xmmslice.d
index 6cf0e238f2..f91ac1f525 100644
--- a/compiler/test/fail_compilation/xmmslice.d
+++ b/compiler/test/fail_compilation/xmmslice.d
@@ -1,6 +1,6 @@
 
 /* REQUIRED_ARGS: -mcpu=avx
-DISABLED: win32 freebsd32 linux32 osx32
+DISABLED: win32 freebsd32 openbsd32 linux32 osx32
 TEST_OUTPUT:
 ---
 fail_compilation/xmmslice.d(110): Error: `__vector(int[4])` cannot be sliced with `[]`
diff --git a/compiler/test/runnable/bitfieldsms.c b/compiler/test/runnable/bitfieldsms.c
index eb40844236..5aee443d55 100644
--- a/compiler/test/runnable/bitfieldsms.c
+++ b/compiler/test/runnable/bitfieldsms.c
@@ -1,5 +1,5 @@
 /* test bitfields for Microsoft C
- * DISABLED: win32 linux32 freebsd32 osx32 linux64 freebsd64 osx64
+ * DISABLED: win32 linux freebsd openbsd osx
  * RUN_OUTPUT:
 ---
                 DM |   MS |  P32 |  P64
diff --git a/compiler/test/runnable/bitfieldsposix32.c b/compiler/test/runnable/bitfieldsposix32.c
index b3aef1e9bd..543d306656 100644
--- a/compiler/test/runnable/bitfieldsposix32.c
+++ b/compiler/test/runnable/bitfieldsposix32.c
@@ -1,5 +1,5 @@
 /* test bitfields
- * DISABLED: win32 win64 linux64 freebsd64 osx64
+ * DISABLED: win32 win64 linux64 freebsd64 openbsd64 osx64
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/bitfieldsposix64.c b/compiler/test/runnable/bitfieldsposix64.c
index e3a3b24c7f..baedb2f761 100644
--- a/compiler/test/runnable/bitfieldsposix64.c
+++ b/compiler/test/runnable/bitfieldsposix64.c
@@ -1,5 +1,5 @@
 /* test bitfields
- * DISABLED: win32 win64 linux32 freebsd32 osx32
+ * DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/dbitfieldsms.d b/compiler/test/runnable/dbitfieldsms.d
index b323ce37f8..42157f7c7b 100644
--- a/compiler/test/runnable/dbitfieldsms.d
+++ b/compiler/test/runnable/dbitfieldsms.d
@@ -1,6 +1,6 @@
 /* test bitfields for Microsoft C
  * REQUIRED_ARGS: -preview=bitfields
- * DISABLED: win32 linux32 freebsd32 osx32 linux64 freebsd64 osx64
+ * DISABLED: win32 linux freebsd openbsd osx
  * RUN_OUTPUT:
 ---
                 DM |   MS |  P32 |  P64
diff --git a/compiler/test/runnable/dbitfieldsposix32.d b/compiler/test/runnable/dbitfieldsposix32.d
index 5af9b6127e..33ef3acdb4 100644
--- a/compiler/test/runnable/dbitfieldsposix32.d
+++ b/compiler/test/runnable/dbitfieldsposix32.d
@@ -1,6 +1,6 @@
 /* test bitfields
  * REQUIRED_ARGS: -preview=bitfields
- * DISABLED: win32 win64 linux64 freebsd64 osx64
+ * DISABLED: win32 win64 linux64 freebsd64 openbsd64 osx64
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/dbitfieldsposix64.d b/compiler/test/runnable/dbitfieldsposix64.d
index 4633b75724..59aaf27327 100644
--- a/compiler/test/runnable/dbitfieldsposix64.d
+++ b/compiler/test/runnable/dbitfieldsposix64.d
@@ -1,6 +1,6 @@
 /* test bitfields
  * REQUIRED_ARGS: -preview=bitfields
- * DISABLED: win32 win64 linux32 freebsd32 osx32
+ * DISABLED: win32 win64 linux32 freebsd32 openbsd32 osx32
  * RUN_OUTPUT:
 ---
 T0 = 1 1 | 1 1
diff --git a/compiler/test/runnable/dhry.d b/compiler/test/runnable/dhry.d
index 1eb463ce8c..4d2e1b3c64 100644
--- a/compiler/test/runnable/dhry.d
+++ b/compiler/test/runnable/dhry.d
@@ -1,7 +1,7 @@
 /*
 PERMUTE_ARGS:
 REQUIRED_ARGS: -release -O -g -inline
-DISABLED: freebsd dragonflybsd
+DISABLED: freebsd openbsd dragonflybsd
 
 Deprecation caused by https://issues.dlang.org/show_bug.cgi?id=20645
 */
diff --git a/compiler/test/runnable/extra-files/hello-profile-postscript.sh b/compiler/test/runnable/extra-files/hello-profile-postscript.sh
index cb986e0a4f..d986ba5939 100755
--- a/compiler/test/runnable/extra-files/hello-profile-postscript.sh
+++ b/compiler/test/runnable/extra-files/hello-profile-postscript.sh
@@ -5,7 +5,7 @@ source tools/common_funcs.sh
 # strip out Dmain since it's symbol differs between windows and non-windows
 # strip out _d_arraycatnTX and _d_arraysetlengthT since they are part of the
 # lowering of the array concatenation operator
-grep -v 'Dmain\|_d_arraycatnTX\|_d_arraysetlengthT' ${OUTPUT_BASE}.d.trace.def > ${OUTPUT_BASE}.d.trace.def2
+grep -Ev 'Dmain|_d_arraycatnTX|_d_arraysetlengthT' ${OUTPUT_BASE}.d.trace.def > ${OUTPUT_BASE}.d.trace.def2
 
 diff -up --strip-trailing-cr ${EXTRA_FILES}/${TEST_NAME}.d.trace.def ${OUTPUT_BASE}.d.trace.def2
 
diff --git a/compiler/test/runnable/ice21727.d b/compiler/test/runnable/ice21727.d
index 5b5745f9df..c373c53c25 100644
--- a/compiler/test/runnable/ice21727.d
+++ b/compiler/test/runnable/ice21727.d
@@ -1,5 +1,5 @@
 // REQUIRED_ARGS: -m64 -O -inline
-// DISABLED: win32 linux32 freebsd32 osx32 netbsd32 dragonflybsd32
+// DISABLED: win32 linux32 freebsd32 osx32 openbsd32 netbsd32 dragonflybsd32
 // https://issues.dlang.org/show_bug.cgi?id=21727
 
 import core.simd;
diff --git a/compiler/test/runnable/test12.d b/compiler/test/runnable/test12.d
index 22f4b84922..9f99d1cc84 100644
--- a/compiler/test/runnable/test12.d
+++ b/compiler/test/runnable/test12.d
@@ -1,4 +1,5 @@
 // PERMUTE_ARGS: -unittest -O -release -inline -fPIC -g
+// TRANSFORM_OUTPUT: remove_lines("warning: sprintf\(\) is often misused")
 
 extern(C) int printf(const char*, ...);
 extern(C) int sprintf(char*, const char*, ...);
diff --git a/compiler/test/runnable/test17559.d b/compiler/test/runnable/test17559.d
index a759f1564c..e485a68334 100644
--- a/compiler/test/runnable/test17559.d
+++ b/compiler/test/runnable/test17559.d
@@ -1,5 +1,5 @@
 // REQUIRED_ARGS: -g
-// REQUIRED_ARGS(linux freebsd dragonflybsd): -L-export-dynamic
+// REQUIRED_ARGS(linux freebsd openbsd dragonflybsd): -L-export-dynamic
 // PERMUTE_ARGS:
 // DISABLED: osx
 
diff --git a/compiler/test/runnable/test19086.d b/compiler/test/runnable/test19086.d
index 04e524e4af..9935f55292 100644
--- a/compiler/test/runnable/test19086.d
+++ b/compiler/test/runnable/test19086.d
@@ -1,5 +1,5 @@
 // REQUIRED_ARGS: -g
-// REQUIRED_ARGS(linux freebsd dragonflybsd): -L-export-dynamic
+// REQUIRED_ARGS(linux freebsd openbsd dragonflybsd): -L-export-dynamic
 // PERMUTE_ARGS:
 // DISABLED: osx
 
diff --git a/compiler/test/runnable/test22597.c b/compiler/test/runnable/test22597.c
index 799740bfe9..2dac36177a 100644
--- a/compiler/test/runnable/test22597.c
+++ b/compiler/test/runnable/test22597.c
@@ -1,4 +1,5 @@
 // https://issues.dlang.org/show_bug.cgi?id=22597
+// TRANSFORM_OUTPUT: remove_lines("warning: vsprintf\(\) is often misused")
 
 typedef __builtin_va_list va_list;
 int vsprintf(char *s, const char *format, va_list va);
diff --git a/compiler/test/runnable/test23343.c b/compiler/test/runnable/test23343.c
index 69004d61b8..27ff5a7cb8 100644
--- a/compiler/test/runnable/test23343.c
+++ b/compiler/test/runnable/test23343.c
@@ -1,4 +1,4 @@
-/* DISABLED: win32 win64 linux32 linux64 freebsd32 freebsd64 osx32 dragonflybsd32 netbsd32
+/* DISABLED: win linux freebsd openbsd osx32 dragonflybsd netbsd
  */
 
 /* https://issues.dlang.org/show_bug.cgi?id=23343
diff --git a/compiler/test/runnable/test23889.c b/compiler/test/runnable/test23889.c
index 46a1bb00ff..2648286d3d 100644
--- a/compiler/test/runnable/test23889.c
+++ b/compiler/test/runnable/test23889.c
@@ -1,4 +1,4 @@
-// DISABLED: win freebsd
+// DISABLED: win freebsd openbsd
 
 // https://issues.dlang.org/show_bug.cgi?id=23886
 
diff --git a/compiler/test/runnable/test_cdstrpar.d b/compiler/test/runnable/test_cdstrpar.d
index 80fbaf26ef..90aa499ab9 100644
--- a/compiler/test/runnable/test_cdstrpar.d
+++ b/compiler/test/runnable/test_cdstrpar.d
@@ -1,7 +1,7 @@
 // REQUIRED_ARGS: -O -fPIC
 // PERMUTE_ARGS:
 // only testing on SYSV-ABI, but backend code is identical across platforms
-// DISABLED: win32 win64 osx linux32 freebsd32
+// DISABLED: win32 win64 osx linux32 freebsd32 openbsd32
 debug = PRINTF;
 debug (PRINTF) import core.stdc.stdio;
 
diff --git a/compiler/test/runnable/testargtypes.d b/compiler/test/runnable/testargtypes.d
index a3825b10fb..4492420aa8 100644
--- a/compiler/test/runnable/testargtypes.d
+++ b/compiler/test/runnable/testargtypes.d
@@ -1,5 +1,5 @@
 /*
-DISABLED: win32 win64 osx32 linux32 freebsd32
+DISABLED: win32 win64 osx32 linux32 freebsd32 openbsd32
 */
 
 void chkArgTypes(S, V...)()
diff --git a/compiler/test/runnable/testthread2.d b/compiler/test/runnable/testthread2.d
index 2c87ecd8a7..346e3862e5 100644
--- a/compiler/test/runnable/testthread2.d
+++ b/compiler/test/runnable/testthread2.d
@@ -1,4 +1,5 @@
 // PERMUTE_ARGS:
+// TRANSFORM_OUTPUT: remove_lines("warning: rand\(\) may return deterministic values")
 
 // Quick, dirty and inefficient AA using linear search, useful for testing.
 struct LinearAA(K, V) {
diff --git a/compiler/test/runnable/variadic.d b/compiler/test/runnable/variadic.d
index 7e9473c332..ddfd92c167 100644
--- a/compiler/test/runnable/variadic.d
+++ b/compiler/test/runnable/variadic.d
@@ -1,3 +1,5 @@
+// TRANSFORM_OUTPUT: remove_lines("warning: vsprintf\(\) is often misused")
+
 alias TypeTuple(T...) = T;
 
 class A { }
diff --git a/compiler/test/runnable/whetstone.d b/compiler/test/runnable/whetstone.d
index 9145c74bcf..48f6010b9f 100644
--- a/compiler/test/runnable/whetstone.d
+++ b/compiler/test/runnable/whetstone.d
@@ -1,5 +1,6 @@
 /*
 PERMUTE_ARGS: -O
+TRANSFORM_OUTPUT: remove_lines("warning: sprintf\(\) is often misused")
 */
 
 /*
diff --git a/compiler/test/runnable_cxx/cpp_abi_tests.d b/compiler/test/runnable_cxx/cpp_abi_tests.d
index 5d4bc99c1b..4e241749fb 100644
--- a/compiler/test/runnable_cxx/cpp_abi_tests.d
+++ b/compiler/test/runnable_cxx/cpp_abi_tests.d
@@ -1,5 +1,5 @@
 // EXTRA_CPP_SOURCES: cpp_abi_tests.cpp
-// CXXFLAGS(linux freebsd osx netbsd dragonflybsd): -std=c++11
+// CXXFLAGS(linux freebsd osx openbsd netbsd dragonflybsd): -std=c++11
 
 // N.B MSVC doesn't have a C++11 switch, but it defaults to the latest fully-supported standard
 // N.B MSVC 2013 doesn't support char16_t/char32_t
diff --git a/compiler/test/runnable_cxx/cppa.d b/compiler/test/runnable_cxx/cppa.d
index 34c295590e..3f8d1d6643 100644
--- a/compiler/test/runnable_cxx/cppa.d
+++ b/compiler/test/runnable_cxx/cppa.d
@@ -2,9 +2,10 @@
 // PERMUTE_ARGS: -g
 // EXTRA_CPP_SOURCES: cppb.cpp
 // EXTRA_FILES: extra-files/cppb.h
-// CXXFLAGS(linux freebsd osx netbsd dragonflybsd): -std=c++11
+// CXXFLAGS(linux freebsd osx openbsd netbsd dragonflybsd): -std=c++11
 // druntime isn't linked, this prevents missing symbols '_d_arraybounds_slicep':
 // REQUIRED_ARGS: -checkaction=C
+// TRANSFORM_OUTPUT: remove_lines("warning: vsprintf\(\) is often misused")
 
 // N.B MSVC doesn't have a C++11 switch, but it defaults to the latest fully-supported standard
 
diff --git a/compiler/test/tools/d_do_test.d b/compiler/test/tools/d_do_test.d
index d2fa379200..814ef98f38 100755
--- a/compiler/test/tools/d_do_test.d
+++ b/compiler/test/tools/d_do_test.d
@@ -62,7 +62,7 @@ void usage()
           ~ "      DMD:           compiler to use, ex: ../src/dmd (required)\n"
           ~ "      CC:            C compiler to use, ex: cl, cc\n"
           ~ "      CXX:           C++ compiler to use, ex: cl, g++\n"
-          ~ "      OS:            windows, linux, freebsd, osx, netbsd, dragonflybsd\n"
+          ~ "      OS:            windows, linux, freebsd, osx, openbsd, netbsd, dragonflybsd\n"
           ~ "      RESULTS_DIR:   base directory for test results\n"
           ~ "      MODEL:         32 or 64 (required)\n"
           ~ "      AUTO_UPDATE:   set to 1 to auto-update mismatching test output\n"